Improving streaming SQ


I have an Aurender A10 and stream Tidal and Qobuz.  I'm looking for an easy and cost effective way to to improve streaming sound quality as it seems to fall a little short of my ripped CD's.  Artistic Fidelity makes an ethernet galvanic isolator (GISO GB) that plugs in between the CAT 6 cable and the Aurender.  I'm wondering if any one has tried this or a similar product and what your experience was.  I don't think this product is available in the USA, but I can get one shipped from Germany for 299 euros.  As always, any and all comments are appreciated!
shoff
@audioengr 

Which is superior in terms of sound quality?  The Ethernet or USB input on the DAC?
I understand you also like the SOtM switch. Still, it is $800. I am using Cardas Ethernet cables and the “Black Box” ($100) for galvanic isolation. I run my Router into a 24 port switch to my system using CAT6 into a four-port switch. Will replacing the four-port switch with a SOtM switch make a noticeable difference? Would I have to buy two SOtM switches so I could bypass the 24-switch?

BTW, I have met Steve Nugent aka @audioengr He is the real thing: an accomplished DAC designer.