Hey guys, I am looking for advise on the best possible subwoofer(s) for maximum sound quality. I listen to mostly classic rock and outlaw country, but, I do throw in some hip hop every so often. The sub and enclosure will go in the rear of my 2002 Ford Explorer. I am trying to build a sound quality based system in this ride. My front door speakers are going to be DLS R6a's, head unit is probably going to be Eclipse 8443 (is that a good head unit for my goals?), not sure yet on the sub amp and door speaker amp. In adition to general suggestions and advice that I am seeking from you guys, here are some additional questions I have for you guys.
1. What is the advantage of going with duel subs over singles? Based on the info I posted above for my particular situation, are duel 10's going to be better, for me, than a single 12? Or are duel 12's going to be better for me than a single 15?
2. What particular sub(s) would yall recommend for max SQ (not spl!)?