Check out SVS and Hsu. They're both highly regarded, although Hsu has a bit of an edge 'round here, lately. You'll probably want to go for one of the bigger models, but both will blow you away. Pmbuko's got an SVS PB1 that I've heard, and it's very impressive; deep, powerful, musical, etc. I haven't heard the Hsus, but they're very well though of.

I am the Doctor, and THIS... is my SPOON!