So I visited Cameron's place to hear this beast of a sub.
I promised not to haze him regarding some of the music selections, although it's SOOO tempting. Lets just say some of it was highly processed pop, Specter style 'wall of sound' production quality, bombastic as all hell. And Cameron likes it really loud.
I think highfigh's take is about right. It's more muddy than Cameron probably realizes, and comparing to a puny JL being flogged to death to keep up doesn't really prove much of anything other than his room is too large for a puny JL sub. He's got some attachment to the enclosure he has, new toy factor and all that, and it really is loud as fucke with no signs of distress, which, muddy or not, is kind of impressive, at least to one who has yet to experience really tight, defined bass. His current room is a limiting factor on top of that, and wasn't handling the extreme spls without adding it's own coloration, so I suggested Toole's book and the articles on acoustics and system setup here. As expressed in the thread here he's a bit resistant to build a more optimal box. But that's what I suggested, and a pro amp with the requisite eq, so basically everything that you folks have already mentioned in this thread.
Cameron, if you don't want to deal with the dust and hassle, you could contract someone to do it for you (highly recommended...let them clean up the sawdust). I can even recommend somebody local to you in Longmont for that task. That driver is a good one, and you really should put it to best use.