Best powered Subwoofer for HT only... Under 1000

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....

Get the Mirage BPS-400. I shopped for several months and listened to everything and could NOT find a better BANG for the buck then the Mirage. This thing is tight in home theater and fairly good with music. This is my second sub and my last for a while until I can afford to spend 2400 for a Revel.

If you want very inexpensive and good sound for the money, the Energy ES-8 goes for about $300 each. you could get two of them and believe me, because I owned one, you'll be amazed at the sound. I'll admit it's not the best, I own all M&K's right now, but on a budget energy subs are pretty good.