What have you guys heard about the Klipsch RW-10d powered subwoofer? I am looking at nice subwoofers and can get this for $330, which it retails at $550. Has anyone here had any experience with Klipsch subwoofers? I have also been looking at the Klipsch Synergy 12"/10" sub, and also a KSW12 sub. Anyone know how the RW-10d compares to each of these? Theoretically, with the higher retail price, it would be better? Can anyone confirm this? Quick replys would be helpful, as I won't have access to this at this price for awhile.