Actually i have a HK898 from MA, and i think that for the price its a bit high but the output and performance is pretty Nice. If you do get MA subs, go with a slightly higher bid then the dual 12 box that they sell, Like the ma 120XE's or something around there, the dual boxes are built like trash, thats not to say that most arnt, but these ones are TERRIBLE lol.
The MA Dual boxes suck the boxes are SUPPER crappy, but the subs are quality, ive literally blown my MA box up like really i have pieces comming off and put $8 in screws into it tonight just to hold it from rattling apart in the next month or so till i can build a better one.