are you kidding me? Orion Hcca is like the one of best is out there on the world, I have seen a Hcca blow away a BTL, no joke. I mean I would get Hcca, plus w7 is way over priced for what it should be, unless you get w7 for less than 300 dollars your all set otherwise get the Orion HCCA, one of my friend has One 12 inch Orion Hcca in a sealed box, it sound so good, now he is thinking about getting 2nd one and put into a ported box for Sound quality level. Both are decent subs, but for the price of HCCA you can't go wrong. Dude if you want to do loud, FI audio and RE audio you got be kidding me, that dude have no experience at all. Look up audioque, sundown audio nightshade, Incriminator Audio? warden series, MMat Juggernaut, ascendant audio, Mach 5, Clif design aftermath series and nuclear series, RD audio, plus Orion HCCA any of those will blow away the FI Btl and RE XXX series, FYI the w7 is not even on the same level as all of those ones. I am not saying that they suck, I still would choice BTL, RE audio MT series and HCCA, for spl any of those subs will hit hard. I wouldn't choice XXX series, unless you want Sound quality.