Mr. Digga, your presentation is impressive. I can tell you're extremely proud of your gear. I must say, though, that automotive subwoofers rarely perform well in a home theater setting. The high Fs and ~40Hz vent tuning is intended to take advantage of an automobile's cabin gain.
Boundary gain / corner loading notwithstanding, that gain will not be as profound in a home theater setting. The 12" HED,
properly tuned to 27.7Hz in a 3 - 5ft³ box hits 20Hz at around -10dB. Those don't look anything like 3 to 5 cubic foot boxes, though -- more like 1.5? In a 1.5ft³ box tuned to 33Hz, you're -3dB at 34Hz, -10dB at 24.5Hz, and at 20Hz you're down 15dB. And that's the best of your subs! I'm not even going to bother modeling your 10's. I daresay your system is loud and has obscene thump (with that one sub hitting 118dB around 58Hz with 600W of power), but has no rumble. I'm sure it's a sound worthy of the silkiest, most magnificent mullet when rocking out, but you're missing so much of the LFE channel with movies.
I suggest that if you sold all your CV subs and enclosures, Crunch amp, and 3 farad cap, then put the money toward a single
Reaction Audio Echo 15, you would get a much more satisfying movie experience. Maybe you could still put a vinyl CV logo on its dust cap, though.
I sincerely apologize if I have urinated in your Corn Flakes. It's not my intention to ruin your day. I can tell you have put a lot of time and effort into your setup, and you have constructed quite a fortress there. I can't help but marvel at it.