i'm looking for sound quality and loud, shaking the body window flex. all of that. for 300$ i can get dd audio 2500 series or i can get the Fi bl or Q for less with the cooling option for free. so here's my question i've heard some stuff about the tinsel lead breaking on the Fi's any comments or something to send me in the right direction. i know these are both quality subs. also is there really that much of a drop in sound quality as there is in spl between the Q and Bl?