Hi, new to this forum, so sorry if this is posted in the wrong place. Anyways, i recently bought a 2006 Chevy Silverado 1500HD and since i've had subs in every vehicle i've owned, i can't stand not having them now haha. So i am looking at putting 4 8" subs under the back seat in a ported box. Looking at 3 different set ups, 1) Rockford Fosgate P2D2 or D4 8s along with a P1000x1 or P1000x2 amp from RF as well. 2) Sundown Audio E8 V.5, but i'm not sure which amp, i've been told i could run the E8 D2s on a SAE-1500D @ 1 ohm and that would be my best option with those subs. 3) Sundown Audio SA 8s, but again, i don't know what ohm subs i should buy, D2 or D4, or what amp i should run with those. Any help would be appreciated!