I'm a car-audio newbie with a '96 mitsubishi mirage (s coupe), help me get a good audio system! Speakers: I don't know what size replacement speakers to get. The manual doesn't say, and the crutchfield online 'what fits my car' guide changes it opinion on what size the speakers are ! (one day its 5&1/4, tomorrow its 6&1/2). Subwoofer: I have a truck, what kind of enclosure is best? (I'm looking for a nice flat Freq. response 20-20,000, no need to cause an earthquake). Amps: who is a good manufacturer of amps? are the cheap ones as good as the expensive ones in a non-competition vehicle?