I recently upgraded my modem router and am very happy with the performance.

The modem is:

Motorola MB8611 DOCSIS 3.1 Multi-Gig Cable Modem | Pairs with Any WiFi Router | Approved for Comcast Xfinity, Cox Gigablast, Spectrum | 2.5 Gbps Port | 2500 Mbps Max Internet Speeds

And the router:

TP-Link AX3000 WiFi 6 Router – 802.11ax Wireless, Gigabit, Dual Band Internet, VPN Router, OneMesh Compatible

Total cost for both was $340 from Amazon and getting download speeds of 230+ mbps here. Sorry for the massive type on my copy/paste not sure how to reduce the font.

Something I should add to my story for folks who don't think that everything can matter. As far as I know my wifi was just fine but we got a notice from Xfinity that they wanted to come out and address some issue that could lead to a future outage. Never heard that before but said ok and made the appt. The guy comes out and all he did was change out the coaxial cable from the splitter that divides modem and cable box. I was previously getting speeds in the 60-80 mb range after the change of cable always over 200 just now measured 261 mbps a radical and unexpected improvement!