One topic I haven’t seen discussed in cord cutting articles is the best way to replace the cable company’s modem/router. I have poured over the reviews and it can be confusing, especially when reading some of the negative reviews on Amazon. We plan to ditch our phone land line, get a 250 mbps Internet plan, and eliminate the cable TV, rented boxes and rented cable modem. I will need to buy Comcast/xFinity compatible hardware. Looks like Arris SB6190 would be a good modem and Asus AC2900 (RT-AC86U) for a router. What have other folks done after returning the rental boxes.
A few things to look for get a modem with that is DOCSIS 3.0 or higher. (If you find a 3.1 get that.)
Asus and Netgear both make great modems.
I got an ARRIS SB6141 modem several years ago (09/2015) to replace the Comcast rental unit. I paired it with a Netgear R6220 router. I have been very please with both units to this day. However appears the 6141 is not Comcast listed anymore. Something about “only 8 bonded channels”.
Back when I had Comcast, I had no issues with d/l speeds. 100 Mbps plan, occasionally getting up to 120 Mbps. I went the separate modem/router route with the thought if one goes bad, I won’t need to replace the whole unit. So far so good.
Having done quite a bit of research, I chose these 2 based specs, reviews and mostly cost. Keep in mind when reading reviews, people have more tenancy to post when they’re disgruntled (see how I toned it down there).