Backing up what AVRat said, I've got the Denon 3808ci. It'll pass a digital signal to Z2 or Z3 as long as it is not hdmi. Optical and coax is ok. My Ps3 doesn't seem to pass an audio signal via both hdmi and optical concurrently, AFAIK. If it does, i'm not set up right. I can use the optical or coax output from my Denon 2910 to listen to music, concurrently with hdmi(I think it sounds much better thant he ps3, but that's opinion, nothing scientific).
Jack