So how many people are using subwoofers

To "piggyback" on the comments by Craig (Garfish), don't overlook the Vandersteen 2WQ sub. I recently added a pair of them (they are intended for use as a stereo pair) to my Vandy 3A Sig's (a reasonably full-range speaker with good response to about 30 Hz), and can highly recommend them. Because the Vandy 2WQ subs come with their own crossover, and are adjustable for both "Q" and efficiency, they are easy to integrate with just about speaker. Both subs have built-in 300 wpc amps as well. In a post I made 3-4 months ago which summarized the subwoofer tests performed by Widescreen Review magazine, the Vandy subs (both the 2WQ and the V2W) were among the highest rated models. You can often find the Vandy subs for sale on A-gon for around $800-850 (infact, there is one currently listed).

A response to "Gold": if you have been disappointed with the way that subs reproduce music, then I'm inclined to say that you haven't heard the right sub(s). The Vandersteen 2Wq subs do a wonderful job with music. They are fast, dynamic, and very musical -- perhaps due to their sealed box design, using three 8" drivers rather than one 12-15" driver, and perhaps due to the use of a custom passive crossover that is inserted between the preamp and the power amp.

Please don't get the impression that I am trying to talk you into Vandy subs. However, FWIW, my Vandy 3A Sig's sound even more musical and responsive since adding a pair of 2Wq's, which Richard Vandersteen attributes to the reduced imtermodulation distortion of the main speaker's drivers. The point of my post is to encourage you to explore some other alternatives to subwoofers that may be more musical in your system. Good subwoofers can add a great deal to an already good system.