Just snagged a copy of the dvd set from Wal-Mart. Wanted to get them for years, but haven't been able to find them that often.
I grabbed the 2-disc package of TMP and STII last night, from Wal-Mart as well. The fact that TMP was the theatrical version sold me; now I have both it and the DE on DVD.
I put it in the player when I got home this evening and just let it run without sound while putzing around doing things, and I think that the picture quality is far better than the DE from 2000. Could just be an illusion, as I haven't take the time to switch the DVDs out for a true comparison. But it does seem that some minor clean-up work was done on this version, IMO.