While this doesn't have anything to do with any recommended editions, I just realized something: If you watch Gremlins, you can actually get a very good glimpse of what Snow White's color timing looked like prior to the 1987 and 1993 restorations.
The old, warm, sepia-brownish look is clearly evident in the excerpts seen in that film, and they may actually be the highest-quality source out there (until someone obtains a print that's not faded)...