Thanks for the input! I completely agree that isolation is pivotal.
Cable Comaony recommended Shunyata Venom V14 Power Cord via their lending program.
A bit concerned even though it's a loaner.
1) Shielded
2) It has a filter - actual noise reduction built in. I've tried digital PC for my front end in the past. I was not impressed. The PC had a filter as well . Rolled off the high frequencies.
I'm considering ordering another power cord from them. This time. A non digital variant.
As far as usb. Curious cable has served me well. Shortest length possible. I'm using class A, and a tube linestage so it provides a nice balance. Thinking I might order a non digital power cord from cable company. Obviously there will be a difference. Perhaps good. Perhaos not so good.
All of this is of this is trial and errror
Refarding Ethernet I find it hard to fathom there is a difference with SQ. It's something I'd have to try. Though definitely skeptical.
I do not stream much so I'm not too concerned with that factor.
Regarding break in time. I'll guess running nonstop for a week? How long on average did things take to settle for your units?