I'd recommend reading "Premium Home Theater" by Earl Geddes. Don't remember it going into electrical distribution per se, but at the very least it will give you a working knowledge of the basic concepts of and what it takes to build a room that sounds good. And although it looks like the ASC system incorporates many of the concepts found in the book it probably comes at a fairly high premium. After reading the book you may find you can achieve much the same results in your own (with your contractor of course) using things like Dietrich resilient channels, green glue, etc. rather than ASC products. I'm not a handyman and can barely nail two pieces of wood together, but after reading that book I'd feel comfortable working with a contractor I know and trust to construct a good sounding room (which is exactly what I plan to do). Then again, if you're willing to pay for the ASC system it looks like it addresses the main issues assuming it's implemented properly. FWIW and best of luck.
Building a house with dedicated stereo room-advice
Building anew house with a dedicated stereo room. The room will be built using ASC's IsoRoom system. It will also have dedicated lines and I will purchase high end plug in receptacles (advice here?). Anything else I should be sure to include? Please advise, particularly with the electrical distribution.