I've demo'd the Servo 15, and a very good friend has the PW2200. I was personally disappointed in the Servo (had high expectations for its price). The PW2200 is steps down from the Servo line. I also paid a visit to the SVS factory. I would take the cylinder over any of the Paradigm subs (especially due to service issues, let alone performance), but I can't say enough about their box subs. For home theater, I've yet to hear anything as impressive as SVS. The Martin Logan Descent is up there with the dual boxed SVS units (the ML are much more attractive, but twice the price). Can you fit the PB12 NSD in your room, or is that out of the question? I've found the cylinders to go extremely low, but they had a different type of bass than the boxed units.