Here is my take on this.
I purchased an 805 several months ago and used it as a pre/pro with my Sunfire amp. I wanted to hear the new HD audio formats and thought the 805 it might be the equal of or close to my Emotiva DMC-1. At the time there wasn't much HD Audio content available and I returned it before my 30 day window expired as I thought it sounded thin and harsh in my very large room as compared to the DMC-1.
I also purchased and returned a Marantz 7002 AVR. I felt the Marantz sounded better than the Onkyo but still did not handle big movie sound tracks or orchestral music as well as the DMC-1. I recently purchased an Integra DCT 9.8 and while not without some issues, I feel the 9.8 is the best sounding most versatile audio component I have purchased (I have also owned Lexicon and Parasound). I sold the DMC-1 and am now happily enjoying all forms of music and movie sound via the 9.8. If you do some research, it really is all the professional reviewers and owners say it is including certain issues with HDMI handshake and lip sync problems with other audio gear. Such is the bleeding edge.