I'm strongly partial to DSP technology.
There's still too much voodoo in subwoofer setup. No one wants to buy an SPL meter and fiddle with the response curve of the subwoofer. Ideally, the sub would have an autocalibration system like that on Harman Kardon receivers. One could place a meter in the listening position, play a frequency sweep, plug the meter into the sub, and have the sub automatically compensate for room resonance and the like.
There's also a lot of room to be innovative on the Hsu internet site. And I don't mean 'slick'; slick to me means graphics and razzledazzle that add nothing. New content, though, particularly if it's innovative, is always welcome. Like, an easy Flash application that would let you input the general layout of your room, and would then list two or three calculated optimal subwoofer positions. Or even just frequency response curves for Hsu's various products.
Bookshelf speakers are another interesting avenue, but I wouldn't do that unless Hsu is certain they would be the best at their price point. I assume most of Hsu sales are direct online. Many, if not most online sales are referrals. That's not really the case with retail chains, but people buy here because someone said it was great in a forum like this. It's all very winner-take-all, and it doesn't pay as much to be second place.
DI