I got a 93 GS, and i wanna put a 12 in the trunk. i dont want to be heard a mile away, but i want it to sound pretty nice inside and within 20-30 feet of my car. what should i get, one guy said itd be easy because it has an amp and 10 already in the back window. but what do you guys suggest i do as far as subs and amps and what not? i wanna spend about 400-500 maybe. and also for a faceplate, i want that one that looks like the factory navigation systems, i dont know what its called or how much it is. can anyone point me towards it?