Welcome to Austin and the Austin HT area!!
I used to consider going into the install business on the side, but in the past two years, the market has become flooded with independant installers as well as the HT store installers. I'm sure some are very good, but recommend you get customer recommendations (as you're trying to do here). I will give you the name of one of your local loose-knit group of enthusiasts:
Frederick Falk. He's done video projector installs, and is in charge of his church's A/V equipment, and is honest and capable regarding planning and installing wiring. I'll PM you with his phone numbers.
BTW, have you heard of Squeeze Box?:
http://www.silentpcreview.com/article287-page1.html