JL W7 enclosures...
#4
You could pick up an enclosure from JL specifially for the 10W7, but would probably be just as expensive as the sub itself.
http://www.jlaudio.com/enclosures/HO110RW7.html#
http://www.jlaudio.com/enclosures/CLS110RGW7.html
http://www.jlaudio.com/enclosures/HO110RW7.html#
http://www.jlaudio.com/enclosures/CLS110RGW7.html
#6
I have owned two Q-Logic sealed enclosures, and they both had air leaks. The first one I put more silicone to seal it up, the second one I returned (did not feel it was right to pay for something and then me have to fix it). I had better luck witht the MDF ones from a local stereo shop.