I have installed many, many stereo systems but have yet to touch an alarm system/ remote starter. I have removed older alarms that people don't want in their cars any more. They are really a joke and could be bypassed in 60secs. 
If best buy is the only place around then I guess you could go there, the only thing I would be worried about then busting up is the radio cage, so you might want to take that out so they can just run the pre-amps up to it.
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92 SVX #772 140k 6speed, ECU Tune stage II, Koni/Ground control, 3,270lbs.
91 Legacy Turbo 5spd. FMIC, crappy stock turbo, ACT clutch.
78 BRAT (New toy) (Soon to be EJ22T powered)
90 240 SX. RB25 powered!! DRIFT!!!111!!! (GF's car)
To many cars to spend time on teh web!
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