First, I want to thank you all of guys for chipping in with your own experiences and advice. This is what I had hoped for when I began this thread. I also hope that others building a dedicated room will find the information here helpful.
In discussing (many times) this room with our builder he told me he wanted me to be directly involved in the entire process of building my audio room. Amoung many aspects of the room we discussed, I told him about the dedicated lines using 10 gauge "cooper" wire and he said no problem, he only uses cooper wire throuhout the homes he builds, just not 10 gauge. He then suggested using a sub panel for the audio room and maybe a whole house electrical filter.
Though I have not settled on the type of wall and ceiling construction all of your input has given me food for thought. If you are wondering the room will be on a concrete slab.
Finally, for everyone beginning a project like this I cannot encourage you enough to do your research. Over the last three months I have spent several hours pouring over every aspect of building an audio room and Mike, I read your article...twice. Your pictures really helped me see what is possible not just for acoustics but ascetics too. It is a beautiful room and I would love to visit you.
One final note. My wife has always supported my hobby and she enjoys the music just not as much as I do. She is not only a supporter but a meaningful contributor too. You should know she is a quilter/sewer/stitcher and will have her own 500+ square foot room...on the other side of the house.
Keep this ideas and suggestions coming.