I don't know about the subzero, can't bring myself to pay $800 for a subwoofer. I do run a pair of tremors tho. It sounds great and my friends at work think the same thing. At present they are set up in a bandpass box and freaking slams with 1200 to it. My buddy at work has them in his pickup at the moment, and has already decided he's getting him a pair of em. I got a brand new ported box for myself for xmas and we're getting ready to put them in it and do a comparison.
But you could always go ahead and get them(the subzeros) and if you don't like em give em to me. LOL