I have always had my own equipment with Xfinity/Comcast. And I always will, there is zero benefit to using theirs for more than a couple months.
Last year I wanted to up my internet speed, and when I did, it got faster, but not what they said it should go to. So a tech came out, and decided it may be my cable modem was too far back in specs.
I agreed to try their equipment, and he said I could return it within 30 days for no cost.
Speed was a bit faster then spec/plan so it was my modem. Also the WiFi speed and range on it was FAR superior to my own old equipment. I was VERY pleased, but I wanted my own.
I did a TON of reading and I wanted the best WiFi period, and I have a lot of equipment in my house, and I wanted 8 wired ports. So I got a separate cable modem, for cheap, it came, I set it up feeding the rental box from Comcast, no speed change. SO then I did a WiFi router search, and things really have changed in last 5 years, but not much new recently in specs, just in quantity.
After reading TONS of real reviews, but testing labs, and other reviews. I blew a lot on the one that had "OVERKILL" in every review. It had a lot of specialty features for gamers, that you can just ignore or turn off. But the hardware is phenomenal.
I got the ASUS GT-AC5300
It has 8 wired gigabit ports, and some can be linked for ultra geeks.
It has 3 radios, 8 antennas and disgusting range speed strength signal on WiFi, my neighbors must hate me! (our homes are spread out fairly good here, so probably now)
Also I use a ROKU with wireless remote which is notorious for blocking WiFi and I now have zero problems. I used to have a device in basement, and 1 upstairs bedroom. Now the whole house (3 floors 2400 sq ft) has speed well beyond the actual internet connection.
Yes it was expensive compared to others almost the same, but I never looked back and never regretted it.
Currently $350 on Amazon.
PLUS it looks freaking cool, or creepy depending on your point of view, but hide it wherever you want, it will work fine.