I have been thinking about getting subwoofers for a while now and have decided that I will. As for current audio I have an 01 GT with the basic audio setup. I want something that will boom and be loud but am more worried about clear crisp sound. What size subs should I go for? How many should I get? Can someone explain to me the difference in sound between 10s and 12s? Also what kind of subs should I get?