dood you don't need 2 12s. i personally think its too much. besides if you have too much power your ears will bleed.(actually it wont) but at any rate. your hearing will decrease. like mine. i have a single 15 inch kicker L5 series pushing 1200 watts RMS on a sony xplod 1200 watt amp . just get a 12 inch kicker l7. i promise you'll be happy with it. it has DEEEP bass. and i mean its like deeper than rupaul's voice. my friends can hear my bass inside their house when im about 400 meters down the block (1/4 mile). and it only cost me about $400for everything(except installation which was like 75)

good luck man