I want to replace the router/modem Comcast with a high quality for streaming

I like TP-Link and Asus routers, just generally. I do usually keep a separate modem and wifi router.

One thing to watch out for is if you have a copper connection from the service provider to your modem (i.e. coaxial or Ethernet). Lightning surges from outside the home can jump from there to all directly connected devices. I use a combination of a gas discharge surge protector outside, an Ethernet to fiber connection between the modem and the router, as well as Ethernet isolators at the end of very long (30’ or more) runs.

Because I do use Ethernet for much of my gear, a lightning surge from outside could take out all my entertainment devices (TVs, streamer, HT processor, DVD player.... etc.) and my gaming PC which is why I’m extra cautious.

If you are not in a densely populated area, and you select an unused Wifi channel though, Wifi can be great, and impervious to lightning surges the same way Ethernet is.

@fastfreight Are you selling that ridiculously priced Switch X?  Looking at their website I can see they've made some simplistic changes in capacitors, but otherwise it's a standard 8 port switch.  The "improvements", as much as they are, seem small and mostly outside the audible range.

Because my better-half insists on having a land line telephone number we’re using the standard Xfinity rented modem with voice for 400 mb service. Is anyone in a similar situation who has purchased a modem with voice that they’re happy with?

fastfreight

I was then able to demo the Switch X in my home. Having it in my system and then not for a bit was revealing.

An in-home demo is the ultimate test. It’s something I plan to eventually try with a Switch X or similar product.

 

 

baconboy

Is anyone in a similar situation who has purchased a modem with voice that they’re happy with?

I use Vonage VOiP with the Netgear CM500 modem. No problems.

OP: I just switched from Comcast to Quantum fiber.  As a result, I have a Synology RT2600ac router and an Arris Surfboard SB6183 modem just sitting here unused.  If interested, shoot me a note with an address and I'll send them to you to see if it meets your needs.  At the time I bought them, the modem was on Comcast's approved equipment list, and it all worked fine for streaming.