The thing that really irritates me about the MGM DVD is that they are using a different version of the soundtrack. I'm not sure if they've mixed the original soundtrack for 5.1 or if they've used the re-recorded version that came out on CD a few years ago, but something about the soundtrack is most emphatically different. I'm guessing that Reggio's DVD probably has the original version. If this is the case, I would also be interested in tracking down a copy.
Still, great movie, regardless...