I am shopping for some subwoofers that are affordable but put out loud bass. I only have my head unit changed at this time so I would need an amp, box, and subwoofers. I am looking into having a dual 12" setup. As of right now the subwoofers I am looking at are the Alpine SWR-12D4 Type-R 12" and the Rockford Fosgate P3D4-12 Punch P3. Any advice on choosing one over the other and what type of enclosure to use.