Just got the AS720, and I must say that I like it. I just set up a sr600 for a co worker (not on the same level, I know), but the 720 whoops up on that Onkyo. The only thing that the Onkyo had on it was the ease of use. The menu system just seemed much more intuitive to me.
The surround on Warhawk is quite good, if you're up to figuring out a good bench test.
On to my issue. I have my ps3 hooked up to my 720 via hdmi, and hdmi to my sharp aquos. I've been trying to get my ps3 to output surround sound via my pure hdmi connection while playing an audio cd. It will only output in stereo, even though it says it's outputting in surround.
Common remedies that I've tried:
1. Reconnect speakers (not needed tho, they work for surround on 5.1 settings from Uncharted)
2. Attempt to cycle through settings (not available in hdmi mode, or atleast it won't take effect.)
I was hoping that it would play it in neo:6 or atleast matrix it, but I've not been able to get it done. Called samsung, but it's too new for their tech's to know what's up.