i know more competitors bringing home trophies with solo x's and dd's over mt's. not dogging the mt, it's bringing home it's share. but i know of a astro van with a pair of 15" mt's and 8kw+ with a wall getting killed (over 3db difference right now) by a pair of 12" solo x's and the same power in a street explorer....and both definitely know what the hell they are doing....(just an example..not meant to infer anything.)
anyway...it's really a toss up. i run a solo x 18 in my truck off just a single 2500d (going to be changing real soon) and it's actually a nice sub. the mt has lots of potential, jsut as the solo x, but it is cheaper (not in quality).
but it's kinda cool to see ppl's jaws drop when they look in the truck and see that square...