Through a guy in Houston, I bought from these guys:
http://www.wcimpression.com
My house is too small to build an enclosed cellar (converted closet or home addition didn't work) so we went with a furniture piece. At the time we bought it we had about 150 bottles in a Transtherm so we went with a 500 bottle unit. It was full in less than a year! Oops.
I like this because it uses Breezaire units which I've read good things about in the past. My friends have Breezairs units in their cellars now and have had no issues either. If I could change one thing, I'd have top mounted vents as opposed to having it on the back. It would me much easier to clean the vents that way.
Had I not bought this, I would have gone for Eurocave, which has a great reputation. We actually just sold our 200 bottle Eurocave that we bought for overflow storage.