@michaelkirschner That probably comes down to preference more than anything. If people grew up with one take ('85 mix for instance), they might prefer that, though those same people might be fed up with the years upon years of constant changes and want to experience it as close to what was original as possible. I know I grew up with Full Frame TV broadcast recordings and then VHS, and Episode IV A New Hope in the crawl is somewhat normal to me as is the sound mix that goes with those version, but I'm happiest watching it as it was supposed to be, without revisions (and certainly not cropped to 4:3 anymore).
Also, I've heard from a person whom watched Star Wars an ungodly ~70 times in '77 in a backwater theater that only had the mono track, and steadfastly insists against anything released since then as being at all proper, he's unhappy unless it has the odd sounding Beru and all the other different bits, since he memorized the movie exactly that way. So, watching it as remembered from experiences in '77, be it mono, stereo or the 70mm's take on surround, is another cause for preference.
In short, all tracks have merit and are looked on differently by different people; it is really nice to have all these different audio tracks available, for both viewing pleasure and the sake of preservation.
Personally, I'll stick with the 5.1 70mm reconstruction for most serious viewings, but I won't lie, I'll be checking out the '85 and the '93 as well (can't stomach much more than just spot checking the mono, though, it is just too 'off' for me).