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

@carlsbad2 said:

There may be other options but this thread is about modems.  

That snarky remark was inappropriate and obtuse.  I  have ventured down the road of a better and new Modem, and like others, stayed with (in my situation) a Verizon 1G modem with a linear power supply.  The Switch X acts as a SECOND MODEM creation a network in your home completely separate from you provider network.  It is this  CLEAN NETWORK which improves the sound by eliminating all your home network traffic (significant unless you have 0 devices in your home).  This approach form me has clearly improved the sound, better than adding any other switch I have tried after the heretofore discussed modems.  So anyone considering buying an expensive modem to replace their Verizon or Comcast modem should consider this.

@fuzztone , 

"Copy the "no difference in SQ"

You are free to spend like there is no tomorrow"

Well my Verizon G100 modem was FREE, and my system does sound better with the Switch X.  I can easily hear it.  That makes a difference.  Enjoy the music.

Thanks for the coaching @fastfreight .  You're quite a role model. 

@lalitk , +1 on the LinkUp 22g cat 8 cable.  I had initially run Supra cat 8 (my runs are about 40 feet) and the LinkUp is better.  I got this from you a bit ago, thanks!

Reasonable cost also from Amazon.

Hi @carlsbad2 ,  I will retract 'snarky'!  Would love to hear a Lampi DAC like yours in my system.  I see we both share the Grimm.  Have you seen GTT's  internal MU1 modification  with a new Realization ethernet cable?  Bill states it is an easily heard upgrade.  I have done it with another cable (and it is easy to hear), but my KS is coming.  I think any good ethernet cable inside the Grimm vs the generic one is an upgrade.  It plugs in at both ends with a standard ethernet plug, and is either 13" or shorter depending upon the MU1 version.  I have learned that it is THE LAST cable before your streamer that matters the most.  So no matter what cable (or filter) employed prior to the Grimm, the internal stock cable degrades it.

I got a Netgear CM1000 modem to replace my Spectrum supplied modem.  I use Ifi low noise power supplies with both the modem and mesh router.  I didn't hear much of a difference myself but since this modem performs better, ie less dropouts, fewer problems, I kept it.  Plus the modem paid for itself in about a year by dropping my ISP's lease payment for use of their modem.  Ethernet cables, I found make a difference.  I prefer silver plated and also found the best ethernet cable should be at the streamer.