"they had a big stand up display of dual disc right in front of the door as you walked in."
Yeah, that one got me pretty angry too.
(and yeah, I think I know the answer as well.)
And no, to my ear, with the limited litstening I have done so far, I do not think that the DD 5.1 mixes are close to what SACD or DVD-A offer.
I'm betting that some of our more science and tech oriented guys here can provide a discourse of sampling rates and the like, but I doubt that you can squeeze in as much info on a disc that is also carrying Video content and "special features" as you can on one that is only providing music.
