since its on your "list" i vote for the solox12, the dual 2ohm version. get a box built to spec for it and start out with the zx 2500.1 amp, and later on you can add another zx 2500.1 if needed. you wont have to worry about not having enough sub if you wanna get super loud later plus unlike the other subs in ur list the solox 12 is rebuildable. on another note....ive moved on from a pair of kicker l7 15s to a pair of dc lvl 3 12s with lvl 4 voice coils in a built to spec box tuned at 33hz and the shit hits harder than the kickers plus they sound alot cleaner.