5 Best Modem Router Combos for Xfinity, Spectrum, and Cox That Make Your Internet Truly Fly
| Product | Brand | Name | Price |
|---|---|---|---|
 | NETGEAR | NETGEAR Nighthawk Cable Modem and WiFi 6 Router Combo (CAX80) | Check Price on Amazon |
 | Motorola | Motorola MG8725 WiFi 6 Router + Multi-Gig Cable Modem | Check Price on Amazon |
 | ARRIS | ARRIS (G36) - Cable Modem Router Combo - Fast DOCSIS 3.1 Multi-Gigabit WiFi 6 (AX3000) | Check Price on Amazon |
 | NETGEAR | NETGEAR Nighthawk Modem Router Combo (CAX30) DOCSIS 3.1 Cable Modem and WiFi 6 Router | Check Price on Amazon |
 | ARRIS | ARRIS (S34) - Cable Modem - Fast DOCSIS 3.1 Multi-Gigabit Cable Modem | Check Price on Amazon |
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At A Glance: Best Modem Router Combos for Xfinity, Spectrum, and Cox
- Our Top Pick
- Motorola MG8725 WiFi 6 Router + Multi-Gig Cable Modem
- ARRIS (G36) - Cable Modem Router Combo - Fast DOCSIS 3.1 Multi-Gigabit WiFi 6 (AX3000)
If you’ve been renting your modem and router from your ISP, you’ve been missing out. Not only do rentals cost you up to $168 per year, but they’re usually outdated, clunky, and underpowered. Upgrading to your own modem router combo doesn’t just save money — it unlocks faster speeds, stronger WiFi coverage, and a level of reliability your provider can’t match.
After reviewing the best options on the market in 2025, I’ve narrowed the list down to five standouts. These modem-router combos all feature DOCSIS 3.1, WiFi 6, and support for Xfinity, Spectrum, and Cox. They’re built for households that stream in 4K, game online, and have more devices than they can count.
If you want the short answer: the NETGEAR Nighthawk CAX80 is the absolute powerhouse, the Motorola MG8725 is perfect for gamers, the ARRIS G36 is a reliable workhorse for everyday families, the NETGEAR CAX30 is the balanced choice for mid-range plans, and the ARRIS S34 is ideal for those who prefer using their own router with a standalone modem.
Let’s dig into each one and see why they’re worth owning.
NETGEAR Nighthawk CAX80 – The Powerhouse Pick
This is the king of the hill. If you want a single device that can handle everything — from multi-gig internet plans to dozens of connected devices — the CAX80 is it.
Highlights:
- Supports cable plans up to 6Gbps
- WiFi 6 AX6000 speeds covering up to 2,500 sq. ft. and 30+ devices
- DOCSIS 3.1 with 32×8 channel bonding for future-proof stability
- 4 Gigabit Ethernet ports plus one 2.5Gbps multi-gig port
- USB 3.0 port for direct device sharing
- Advanced NETGEAR Armor security with a 30-day trial
- Buy on Amazon
In real-world use, the CAX80 shines in households where multiple people are streaming 4K video, gaming online, and running smart home devices all at once. The multi-gig port and support for link aggregation means you’re not just getting today’s speeds — you’re ready for the internet of tomorrow.
This is a premium device, but for heavy users it more than justifies the cost.
Motorola MG8725 – Best for Gamers
Motorola has always been a trusted modem brand, but the MG8725 takes things to the next level with gamer-friendly features.
Highlights:
- DOCSIS 3.1 modem with WiFi 6 AX6000
- First model certified for Low Latency DOCSIS (LLD)
- 2.5Gbps Ethernet port plus three Gigabit ports
- Beamforming, Power Boost, and Range Boost for whole-home coverage
- Family profiles and malware blocking through the motosync app
- Buy on Amazon
The big deal here is low latency. If you game online, you know lag is the enemy. The MG8725 was the first modem-router combo to earn Low Latency DOCSIS certification, which makes it ideal for smoother online play and crisp video conferencing. The app-based controls are another bonus, letting you set parental limits, run speed tests, or block unwanted sites with ease.
For anyone serious about gaming or video calls, this is the one to get.
ARRIS G36 – Reliable Everyday Workhorse
Not every household needs blazing 6Gbps speeds. That’s where the ARRIS G36 comes in. It’s built for stability, simplicity, and dependable performance.
Highlights:
- DOCSIS 3.1 with WiFi 6 AX3000
- Approved for Comcast Xfinity, Spectrum, and Cox
- Speeds up to 1.2Gbps — plenty for most plans
- Sleek design with an easy app-based setup
- Savings of up to $168/year compared to ISP rentals
- Buy on Amazon
This is the “just works” option. If you have a gigabit plan or lower, the ARRIS G36 will cover your entire household without breaking a sweat. It’s not the most powerful on this list, but it doesn’t need to be — it’s rock solid, affordable, and built to last.
Think of it as the dependable family car that always gets you where you need to go.
NETGEAR Nighthawk CAX30 – Balanced and Affordable
The NETGEAR CAX30 is the younger sibling to the CAX80, offering strong features at a more accessible level.
Highlights:
- WiFi 6 AX2700 speeds (up to 2.7Gbps)
- Coverage up to 2,000 sq. ft. and 25 devices
- DOCSIS 3.1 with 32×8 bonding
- Four Gigabit Ethernet ports plus USB 3.0
- NETGEAR Armor security suite
- Buy on Amazon
This model is perfect for medium-sized households that don’t need extreme speeds but still want the advantages of WiFi 6 and DOCSIS 3.1. Setup is simple with the Nighthawk app, and you still get premium features like NETGEAR Armor for security.
If the CAX80 feels like overkill, the CAX30 is the smarter buy.
ARRIS S34 – Best for Custom Setups
Not everyone wants an all-in-one combo. If you already own a powerful mesh WiFi system like Eero, Orbi, or Google Nest, then the ARRIS S34 modem-only option is the way to go.
Highlights:
- DOCSIS 3.1 modem (no built-in WiFi)
- Supports up to 2.5Gbps speeds
- Works with Xfinity, Spectrum, and Cox
- Simple activation via SURFboard Central app
- Buy on Amazon
This modem gives you the flexibility to pair with whatever router or mesh system you prefer. It’s especially attractive for people in larger homes who already run mesh WiFi, since you won’t be paying extra for router features you don’t need.
It’s a straightforward, high-performance modem that does its job well.
Which One Is Best For Who?
To make it even simpler, here’s a quick guide to match each model with the right type of user:
- NETGEAR CAX80 – Best for power users with multi-gig plans, smart homes, and families that stream and game all at once.
- Motorola MG8725 – Best for gamers, streamers, and video call heavy households that care about low latency.
- ARRIS G36 – Best for everyday families on gigabit or lower plans who want a reliable, no-fuss option.
- NETGEAR CAX30 – Best for medium-sized homes needing a balance of performance and price.
- ARRIS S34 – Best for people who already own a mesh WiFi system and just need a future-proof modem.
| Product | Brand | Name | Price |
|---|---|---|---|
| NETGEAR | NETGEAR Nighthawk Cable Modem and WiFi 6 Router Combo (CAX80) | Check Price on Amazon |
| Motorola | Motorola MG8725 WiFi 6 Router + Multi-Gig Cable Modem | Check Price on Amazon |
| ARRIS | ARRIS (G36) - Cable Modem Router Combo - Fast DOCSIS 3.1 Multi-Gigabit WiFi 6 (AX3000) | Check Price on Amazon |
| NETGEAR | NETGEAR Nighthawk Modem Router Combo (CAX30) DOCSIS 3.1 Cable Modem and WiFi 6 Router | Check Price on Amazon |
| ARRIS | ARRIS (S34) - Cable Modem - Fast DOCSIS 3.1 Multi-Gigabit Cable Modem | Check Price on Amazon |
* If you buy through links on our site, we may earn an affiliate commission. For more details, please visit our Privacy policy page.
The Few Downsides
No product is perfect, and these modem-router combos have a couple of things to keep in mind:
- Premium models like the CAX80 and MG8725 are expensive. If you don’t have a multi-gig plan, you might not use their full potential.
- ISP certification for advanced features like Low Latency DOCSIS can lag behind hardware capabilities. Some features may need firmware updates.
- WiFi coverage claims are based on optimal conditions. Larger or multi-story homes may still require mesh extenders.
Still, these are minor issues compared to the long-term benefits of owning your own device.
Our Take
If you want the best overall experience, go with the NETGEAR CAX80 for its powerhouse performance. Gamers and video-call warriors will love the Motorola MG8725, while families looking for a rock-solid everyday option can confidently pick the ARRIS G36. For a balanced mid-range choice, the NETGEAR CAX30 hits the sweet spot. And if you already run your own mesh WiFi system, the ARRIS S34 modem-only solution is the clear winner.
No matter which one you choose, you’ll get faster speeds, better coverage, more security, and the satisfaction of never paying rental fees again. In 2025, that’s an upgrade every household should make.