Sure they look drop dead sexy with corbon look and all but, do you buy these because of that? On looks alone, I would!
I know I shouldn't really judge a sub on only its specs alone but, I think a speaker should have some sort of effeciency (92db ish any thing above that is gold). I really like the JBL power series (~95 db) but, then again I haven't heard them. I might buy one just to test it.
All this goes to the point of power and how much can you afford to throw at a sub... I know many of you have huge amps and don't even blink at less effecient subs. I like the subtleness of only having a moderatelly powered system and have it kick @ss.
I guess the ultimate test is to really give them a listen and judge for your self, because we all know we all like different things.
Having said that, I would like your impressiions on the X-Max or any other sub that can be smooth (SQ) and kick hard when wanted.
ID
MB Quarts
Infinity perfect 12 (rocks, I have one)
Others
Let me know...

Thanks.