I'm just starting to get in to the whole car subwoofer business. I first need some help picking how many subs and which kind I should get. I've been going back and forth between the Rockford Fosgate P3D4-12 and the Alpine SWR-12D2 Type-R. I know I want 12's but i don't know which one to go with and wether or not to get 1 or 2. I want loud but deep bass. Any help would be great!