In my opinion, spend the money on a JL 300/4 4 channel amp to power a set of Infinity Kappa Perfect 6.1 6 1/2" components, (very affordably and great sound quality)...
Next a JL 500/1 mono block amp with 2 JL Audio W7 15" subs. Buy an enclosure that was disigned for these subs by JL, just go to...