If you end up going Klipsch, check Corey at Paducah Home Theater for pricing @ 270-556-8427!
Klipsch will not allow a seller to publish pricing, but he consistently gives a sweet deal!
Very important - if you want to get Klipsch subwoofers, they do have a series that is pretty decent. It used to be designated with a model number like R-112SW or R-115SW (the R-12SW or R-15SW was a crappy sub). Here is a review of the R-115SW:
Brent Butterworth reviews Klipsch's $899 R-115SW subwoofer, a ported design that uses a 15-inch Cerametallic driver and an 800-watt Class D amplifier.
hometheaterreview.com
The measurement chart appears to be corrupt (right now), but you can pull the CEA2010 data from here:
docs.google.com
The older R-115SW has been replaced with the newer Klipsch SPL-150 subwoofer.