Hey guys....I've been away for a few years, but I'm back now. I am looking to upgrade my current subwoofer setup. My last legitimate setup was a DIY 15" Tempest-X in a ~6.5 cu ft sealed enclosure that was not built well enough, running off a Behringer EP2500. I am looking to model my next build after the long standing rock solid performace of the SVS PB-12 or the PB-12 Plus. So, what drivers, amps and ported enclosure designs should I look at?