I was thinking about getting one, but I kind of figured it would be overkill for me as I know I wouldn't use all the bells and whistles on it, but having Audyssey would be nice. When I did have a receiver (a lower end Onkyo btw) that offered it, I think it did make a difference for movies, but unfortunately the receiver wasn't so great for audio use, which is why I went back to a 970. Glad to hear it's working well for you. How do you like audio only through it though?
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HT:
Pioneer VSX-1120
Salk Songbirds, SongCenter, SongSurrounds
Panasonic BDP-45
Outlaw LFM-2

2 Channel:
Red Dragon M-500 monoblocks
BAT-VK3i
Salk HT-1TL's
Apple TV
Beresford 7520 DAC
Surgex XS10