Great article by Keith Yates in Ultimate AV(the new name for Stereophile Guide to HomeTheater). He compared the Revel, Wilson Watchdog, Kleiss, and Genlec Powered subs. What really stood out and represents a real change for the magazine is the measurements he performed. I really liked the dynamic compression measurements and thd at 100,105,110, and 115dB. Check it out if you can.