ok so i am looking to get either 2 15" BLs or 2 15" Qs. i am powering them with a Rockford Fosgate 20001bd amp, which i was told throws out about 2800 watts of power when i called Rockford. i am also building a custom box outta 3/4" MDF that i'm not completely sure about dimensions for yet. now i am leaning towards the BL because even though both the BL and the Q have the same power handling, the BL i am told can take more punch, which would compensate for the 800 extra watts from the RF amp. but everyone says that the Q is all about sound quality. is the BL going to have good SQ along with it's SPL? if i can hear that the BL will have good sound quality or better, than i'm going for them. if i hear, though, that the BL doesn't have good sound quality and is just strictly an SPL sub, then i will go with the Q and go with the bp power to compensate for the 800 watts.