Thanks for that link. Very educational. I spent a lot of effort trying to get my power amp on its own circuit and everything else on a different circuit. It sounds like this was misguided. I would guess that a 15 amp circuit would be sufficient for a simple 2 channel system.
It would greatly simplify things for me to get everything on the same circuit using a modified SurgeX product. I will keep checking back for updates.
I'm putting together pricing for the SurgeX units, a basic one will cost about what a new unmodified one would cost. Then I'll have a list of ways to spend much more money on it...

It seems like most people don't take the effect of ground connection resistance into account, in both power delivery as well as ground connections inside components and IC/PC cables. I very often hear that my ICs and PCs lower the noise floor, which is simply a result of designing for that factor.
For your power delivery, if you use 10g wire, 20a breaker and a nice receptacle like the Furutech FPX or GTX, that should be plenty of power for your system, assuming you don't have a stack of PA amps in your system.

If you want to go a little further you could get a spool of black (hot), white (neutral) and green (ground) 10g stranded THHN wire or similar and twist the black/white (use a drill) then wrap the green around the pair in the opposite direction, then run that in conduit... I think plastic would be easier and you probably don't need to worry about shielding it in a normal home environment.
Then plug in a ZenWave Edition SurgeX

into the line you just ran, and your whole system into the SurgeX.
It is pretty simple... in audio design I try to keep it simple and use the best quality parts I can find. This design philosophy yields the best bang for the buck and will often surpass much more elaborate and expensive designs.