hdtv00 - I saw your posts over at the EVGA forums as well.
I'm nervous because I, too, plan to have the GTX 680 hooked up into a Receiver, and from the Receiver into the TV. All devices are HDCP compliant.
Out of curiosity, does your Receiver allow for playback of loseless Multichannel PCM? Although it's loseless, bitstream audio (e.g. Dolby True HD) is still a compression method and a slight quality is lost upon playback (vs. having the Receiver truly decode the audio).
Of course, my question is moot if the GTX 680's HDMI won't even allow carrying the Audio File into the Receiver.