ok, so i have my caddy and 2 12's that aren't loud and sound bad..... anyways, i got another job now and i dont know if i want to get a new car or keep this one and tint the windows, rims and get a new system.... so that being said, if i keep the car, what should i do for subs and a box? i cut out the middle arm rest soo air and shit can get through, so i was thinking maybe a 15 or 18 in a big ported box and the port in that hole? just need some ideas... i want to keep the sub under $250 or around... and be a single set up.. power will come next and will get a amp with enough power on tap.