Hi Rodman. I have used an MIT Oracle AC3-non networked pc, and an Oracle AC1-networked pc with 1 box. Preferred the AC1 and that's what's used now.. I found isolating the analog from digital, using an Equitech blemished 2Q transformer in a box, a benefit I would never step back from. I also have experimented with additional isolation and conditioning for the RT-20 and found additional benefit. I'm hoping the ac cleanliness these efforts have provided will allow me to eek out additional nuance and emotion by the changes you've suggested. I can't afford to replace the Rt-20 now so wouldn't do anything to it myself.