I would only take my car to 4 places.

John at SA on DM,
Kevin at CC in gainesville
Sensous sounds, Eric
or ultamite audio down here.

Not that I like these guys install style better or anythign, I just trust them. Its been known to happen in the industry, where shady installers will take an extra remote and program it to your alarm, then take the address off your invoice, and come over later, turn off your alarm and steal your stuff.