Yeah it sounds great to me but I haven't played it through a decent 5.1 set up yet so I'll reserve final judgement until then.
By the way SM, what did you make of the new extras? Was there as much as you wanted, or not enough? I still can't understand why they haven't included the Appendix stuff yet. It's obviously out there, because I have it and you most probably do too. They can hardly call it exhaustive when there's stuff, what, 10+ hours of stuff out there?