You can't get a killer sub that's going to shke pictures off the wall and terrify the neighbours down the block for $200. You can however get a sub that will add to the bottom end of the sound spectrum where bookshelfs and many towers can't go. This is my suggestion, soundcity.com is clearing out some Velodyne sbs for $189 and $229 plus shipping respectively. The cheaper sub is about $210 shipped, the more expensive is about $270 shipped. They usually retail for much more than this price but the units are factory refurbs. They still have the full MFG. warranty however. I'd suggest you go for the more expensive one but the smaller one is still an ok unit and a good deal at the price. Oh yeah, and they have remotes! Pretty cool feature.