Thanks for the impression. It's been a while since I followed Head-Fi closely (it wasn't healthy for my wallet ).
Even though I've yet to try Dolby Headphone for games, I actually find CMSS in games a bit distracting (I seem to play better with it off for some reason). My headphones does allow for a huge sound stage so I have no real complaint in that area.
I've not tried CMSS with music. I tend to listen to music in Audio Creation mode (purist in me ), so that mean no DSP. I may give it a shot sometime though.
But yeah, I always watch my movies with CMSS on (in Entertainment mode - which sounds different from the one used in Gaming mode). I very impressed by how immersive it feels especially in conjunction of my headphones (AKG-701).
Creative really need to make a true successor to the original X-Fi with surround digital out (apparently older Audigy could do that), Dolby Headphones etc.