Best Boom for the Budget

Arrow12 might have linked to the wrong box there.  That one is for a 10" (?) and it's made with 5/8" baffles.  It looks like a 1 cu ft sealed box is the way to go, too.  I would make a double-baffle face, meaning 1 1/2 " thick, because this is where the box resonance will be most troublesome, and there's not a whole lotta wood left after you cut out that hole..  The rest, I would use 3/4" MDF, and I would get some bracing inside it as well.  That's going to pound mad.  I like the sub/amp combo, though, and they should do the job.

If you order a premade box that is built sturdy enough (...doubt that you can find one...) for that sub, the shipping would cost at least $30, I'll bet.  But you should be able to build one for $50 or so. 

This would be the setup I'd get if I wanted to be loud on a budget. I would put them in a slot ported box and call it a day.

Sorry for the wrong link.  That's my bad.  Oh and customsuburb...  woofersetc.com doesn't give a factory warranty or else I'd give other suggestions from there.