Well, since I'm the 1st one in the new forum, I get the honor(?) of making the obvious post.
Subaru Specialists/S-Squared Motorsports
600 Sunbeam Ave #1
Sacramento, CA 95814
916.442.6409
http://www.ss-ms.com
In my experience with S-Squared, the most important thing I've noticed about the shop is that they guys there really care about their customers. Sometimes to the point where they overextend themselves by agreeing to do too much work! However, Joe and Nate are extremely knowledgeable, and eager to do things right, and fix any issues if they should arise.
Prices for parts tend to be inline with the "going" rate elsewhere, though there can be delays, since they don't stock much. The real strength of this shop lies in their experience with Subarus. Joe and his squad of techs have been wrenching Subarus for years, and they know how to get a job done. Nate's been tuning for years as well, and has the right tools (Mustang dyno) to put a mean flash on your ride.