If you are willing to push the $1000 envelope, then you may want to look at the M&K MX700. It has two 8" drivers and has a total size of 14" H x 17" W x 11" D (approx). This is about the fastest sub that I have ever heard, and was designed to be shoe-horned into a very small area. At my local "High End" audio / home theater store, they have this sub in their "million dollar room" (all McIntosh, Revel and Madrigal equipment) even though they have other subs (such as the Revel B-15) that cost 2 to 4 times as much. The only drawback to the M&K is that it is very sensitive to room placement....put it in the right place, jaw drops....put it in the wrong place, you will wonder where the money went. Any dealer worth their salt will let you audition in your own home (though beware of restocking fees if you return the item). If you have a local M&K dealer available, try the little MX700 out....