ok. right now i currently have 2 12 inch PG xs series subs that hit pretty hard. but, i want MORE. in feb-march, im thinking im gonna re-do the sub part of my system, so im looking for suggestions as to what brands i should look at. i do want to compete, but, correct me if im wrong, but if you have 15 inchers your in a different class right? i would want to stick with eather 2 or 4 12's, or possibly 2 15's if i can get some killer LSQ/spl from them. these subs would be daily drivers, but not turned all the way up. thanks for all the replys!