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

I bought the motorola 8702 which has docsis 3.1 it’s faster has a bigger buffer, 

what’s very important is that junk $5 wall wart ,you need a linear power supply 

I bought on Audiogon the Linear Tube Audio LPS and its excellent much cleaner sounding and much more musical with all the noise removed.

most modern rough terms are around 4 amp , this LPS can go as high as 8 amp 

and comes with a excellent DC cable going to the router most charge $150,and 

buy a decent power cord like the Pangea  sig mk2 awg14

  for $700 it beats anything under $1200

and also gives a better picture too to the tv Roku  which I like better with voice commands , Qobuz sounds much better .

and buy a quality Ethernet hub and cables