High Current Outlet for Amps?

This is going to depend on the efficiency of the speakers, SPL, and what operation class the amp uses.

One thing is clear tho -- a dedicated line is close to the last thing you want to do to improve SQ.  if you are doing a remodel anyway, then just go ahead - get bids for the different options first.

Audio Research specifically cautions that a power conditioner may or may not be the best solution - they don't say what to do tho (except to see your dealer).  I find that dealers rarely have EE degrees so don't rely on them.

Anyway you can decide that later... since there is no real cost increment, just get everything you can under your code (usually nearly the same all over the US if you are in the US).

You could wind up using a pure DC setup with ultra-capacitors or batteries fed by solar cells anyway...

Since you are doing a remodel, now is the time to think about the optimum dimensions, and construction, of a perfect listening room...