My step dad owns R.H. Tinney INC. They don't typically do residential, but with the hold up in commercial building I'm sure they'll entertain the idea. I did a bunch of residential jobs for them when I worked there (doing full condo complexes). My only advice is to make sure you get somebody that is experienced. There are a lot of fly by nights that will gladly hook you up cheap. You want the correctly sized equipment, wired and installed to code.
(925) 373-6101 or www.rhtinney.com
Talk to Patrick or Bob. Tell them I sent you.