Options to improve digital sound

My 2c:

Do the Sonic Transport , great Roon Core host.  Then pair that with the Bryston BDP-3 on here for $1.5K.  The BDP makes a great Roon endpoint.  You can have your attached storage off the ST and have it integrated with ROON or Hang it off the BDP which will sound great. BDP interface is Spartan but it works for file storage.  The Switch from ROON endpoint to direct on the BDP is also a snap. Looks like you can match up the AES output/input as well which should be another +

thishttps://help.qobuz.com/en/articles/307885-what-is-qobuz-connect

and a Aurender or InnuOs product is the best way for streaming. 
It allows you to use the native app from Qobuz. No need for Roon. They have come a long way in simplifying and making it sound fantastic. Take advantage of this situation it is truly the velvet path.

I went from a MacBook Pro to a Project Stream Box S2 Ultra. Then upgraded the Project with a Teddy Pardo LPS. A very good improvement. I was happy. 

Last year upgraded to a new Antipodes K21 (on special). Darn. A big step up! Well worth the investment.

The rendu nothing special go for a decent streamer innuous pulse with linear power supplies , at your router that cheap $3 wall wart power supply just adding noise.

small green computer 8 amp 12 v , look on your router most are 12 v now 

$299 LPS power supply , what is your Ethernet switch. LHY 6  best bang for the $$ 

and what are you Ethernet cables ,and usb ?  That too a big influence .I recently bought a Stealth usb cable , a excellent product , I bought their latest Tunable to adjust more or less bass  Anthony at Perrotta consultants  gives good pricing and service that’s where I bought both the innuos streamer and Stealth ,

ethernet your end point most important  quality does count for sure in digital cables too.

Check out Lumin and Silent Angel line of products. 
 

Good luck and let us know how make out!