Good SQL sub for hifonics Colossus XX?

I recently Bought a Hifonics Colossus XX And 2 Hifonics Goliath 15" HSPL subs. Sadly, the 15'"s just will not work! They are the "old" goliath xx subs and require 5.3 cubic feet of air space!! I am wanting 2 really good SQL subs that will work in a box 6 cubic feet TOTAL. Iam leaning towards( 3)13w7's so far.. or 2 15" brahmas.. but NO ONE has any Brahamas! they are all out of stock! Can anyone give me any ideas??? And no, I am not looking to buy your used subs! lol . Just looking for some tips!! Thanks,  Trevor

You just named my favorite subs. Either wait for the Brahmas to come out (it may be a while) or get the JLs. You could also look at the RE XXX, it's geared a bit more towards SPL, but sounds great still, and at the volume you obviously listen to your music at, you'll be to deaf to tell the difference in no time.Nik

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