This is probably my last update because the new set up is exactly what I was looking for: dead quiet audio for my computer system (an electrical noise storm). For years I've had trouble with copper wire connections between my PC and audio gear. At times I could hear my mouse move across the screen. No more.
Here's the set up: PC > optical cable > SMSL DO 100 Pro 2 dac > XLR cables > Kali IN-8 speakers. No pops, buzzes, or clicks (PC boot up or anytime). Classical guitar is clear and bright in the quiet passages, and the electronic beats are powerful and punchy. The Kali speakers have great imaging.