well i live in houston so all the car audio stores are either super over priced or just rip you off, so ive found that the only good place to get stuff installed is at frys'
i would order the stuff online and take it to a reliable car audio place, or do it yourself, no better way to learn everything bout your system then installing it yourself, any brands that you are leaning towards?
i personally like rockford, hifonics, quantum, sound solutions audio, dc audio, digital designs, mtx, mempghis
and are you going for sq or spl?