Check the thread asking about the XPA-7 on the amplifier page . I wrote about my experience with the XPA-7.
Optoma 8600 projector, Marantz AV 7702,XPA-7,UPA-500, Wyred4Sound STP-se pre-amp, Audio Space CDP-8A cd player, Sony BDP-CX960 changer, Toshiba A35 HD-DVD, Music Hall 7.0 turntable, Sony HAPZ1ES music streamer, OPPO BDP-103D alregion Blu-ray player, dual Rythmic FVX15 Subwoofers in front and Epic Tower in back, Salk Sound HT'3's for mains, HTC SAlk center, ERD-1 for surrounds and backs and four ceiling speakers for Dolby Atmos ,GIK acoustic ceiling panels, GIK free standing Acoustic panels