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

@lalitk 

"I have taken a single feed from my Comcast modem to my switch which then feeds my three connected devices (DAC, Streamer and Content Server)." 

That is exactly what works for me.  The server is connected to the switch as are two separate Roon endpoints and it all works flawlessly. 

"The 22AWG version is pretty stiff so no sharp bends. The 26AWG version is more flexible."

I too took your advice about the LinkUp Cat 8 cable and use the stiffer 22AWG for runs of 1M or over (the shortest length they sell is 1M), while using very short runs of the more flexible 26AWG to connect switches to peripherals like FMCs.  Regardless of which of the two gauges, those seem to be very well-made CAT cables and particularly the connectors, which appear to be very similar to the well-regarded Telegartner connectors.

After reading this thread, I checked my actual internet speed compared to what I am paying for and found it to be only about half what it was supposed to be.  The Comcast/Xfinity website was helpful by showing that my modem is outdated, the non-Xfinity modem options that are considered current, and a link to the speed test.   I then purchased a new DOCSIS 3.1 Gigabit cable modem from the list that will hopefully provide the speed I am paying for. 

Arris SURFboard modem and Orbi mesh with Comcast/Xfinity here.

Compatibility is simple, just check - most are compatible.

No problems whatsoever over several years. When these reach EOL I would consider upgrading within the same brands.

The Orbi mesh base router has ethernet ports. I wire one of them to a switch and then hardwire from the switch to my server (which is in the network room).  There is fiber in-line between the switch and the server for isolation. Also, hardwire from the switch to my streamer (which is in my system room) using fiber for isolation. Two other music systems have endpoints hardwired via short Ethernet cables to the two Orbi mesh satellites. So, wi-fi to the satellites and then short Ethernet cables to the endpoints.

No noise issues at all.

Good luck.

@ghdprentice - Xfinity just left after helping integrate my new Arris SURFboard T25 DOCSIS 3.1 Cable Modem, which doubled my internet speed over what I was getting with the previous modem.  Speed Test showed well over 500 Mbps now, which is certainly all I need for my home usage and which was well worth the $112 cost.

@erik_squires 

"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."

Do you, or anyone else, know whether a fiber optic line connection (instead of Ethernet) would prevent problems in the event of a lightning strike?

@hce1 

"But, the TP link gaming router delivered significantly better audio and video services than any of the other three."

I am curious, would you describe specifically how the TP link gaming router made your audio system sound better (i.e., which sonic attributes of your system improved and in what way)?