i finally heard a maw 12 and was really impressed, definately worth the money and then some imo. almost bought a pair the other day. but the one i heard was properly powered, so i don't know how efficeint they are and what the 15"s will be like with only 200w to each since they're 500rms and most give them more than that. i'd say give them more power, maybe email kevin at low-hz and get a deal on a sundown 1000d or something along those lines.