I'm lookin for the best overall sub, but im kinda leanin more towards spl. My car is a 96 sunfire. and the sub and amp have to be able to share the power with my other 400 watt 4 channel amp. i have a 150 amp alternator. Which would be the best subwoofer out of Jl Audio 13W7 or the Alpine Type X? Which would be the best box for SPL and which amp would be the best to get the MOST out of the sub? Also remember i have to be able to run it off a 150 amp alternator