Harmy said:

That I can agree with but in the case of the soundmixes it's also damn difficult to say which one is the real true original. All three would of course be best but that is sadly quite unrealistic.

Yes, all three '77 sound mixes are part of the original theatrical run, so IMO it is an obvious inclusion, what is sad is that I do agree with you that it would be kind of unrealistic to expect it on a potential future video release, if you're going by other video releases nowadays. The audio part of a film is somehow not considered equally as important and holy as the visual part when it comes to preserving the illusion of the world they were trying to present to us then, which is something I don't get. (not directed towards you)

IMO a well made mono mix can wipe the floor with a 7.1 surround mix even though it's not as technically powerful, and even if it doesn't for some people, it is equally important of preservation as the image itself.