The 200 is the precursor to the 12 and, oddly enough, seems to be the better sub. Klipsch scaled down the amplifier in the 12, and they also seem to have more QC issues with the whole KSW-12 itself.
Although trashed on alot here- I'm fairly impressed with the KSW12. I can tell it has a fair amount of boost at around 30hz but this makes movies and music fun. I'm comparing this to my sealed Tempest which is very flat to 22.45 hz.