Sorry for catching this late. If you want a regular shop I have been going to a place called:
Davis Repair
6867 S Emporia
GREENWOOD VILLAGE, CO
It's just behind the new Fay Myers motorcycle on Arapahoe and I-25. I'm actually having them replace my AC compressor next week.
If you want a good Suby dealer, stick with Burt on Broadway (don't have the address on me). They are pricey much like every other dealer, but they are quite nice when you start talking SVX's to them. They also seem to have every dang SVX part known to man in stock, or will have it in less than a day.
Doing the timing belt, waterpump, sparkplugs and other misc things isn't all that hard either. I made a bunch of how-to's when I did mine to help people out if you feel inclined to try it. You can check them out at:
http://www.ryanmacdonald.com
Just go under "My Sunfire/SVX" and then into the "SVX How-To's"
Had a few people follow the timing belt how-to and they all have been succesful.
Good luck,
Ryan