I bought my AD08s from tire rack for a pretty good price. IIRC they were discounted, but as far as mounting goes the America's Tire shop I go to near my house, due to the lack of performance shops in the desert and my lack of motivation to drive down the 15 freeway, does a pretty professional job all around. I can't speak for their other locations other than the few I have been to, but always had good experiences. Also, tirerack delivers to the installers as well, so all you'd have to do is show up with your wheels.
Hope that helps.
Good luck man!
EDIT: I hovered over them every second they were mounting and balancing.