Yea, and that Prefab box sounds sick, but I'd go with a pair in a medium sized ported box tuned to around 34Hz.

those subs...infact that whole Access line has such detail for the money. You won't find a much better all around sub for the money. Focal recomends porting those subs....so they'll get loud in the right box....they are tight as a virgin and IMO, the price is right.

 

I will have to agree with Brandon on the CompVR. When I first built a system with the Comps, I must admit that I had already passed a judgement on them due to their overall look and design. They have the Kicker look to them - mean, loud, agressive, show-y.
However, after I dropped these into 2 nice sealed boxes and put some power to them, they really did sound fantastic, very much more than I had expected.

 

I demoed an OZ Matrix Elite sub at the local shop last summer. It was in a ported box. It sounded pretty good, and the build quality looked pretty good as well.

I would have liked to have heard one in a sealed box though. I love my 12W6v2, sealed.