I think you're about right Ken, Tower is all over the board with this pre-order edition. I'm thinking the set for 25 bucks might be worth a look, it doesn't have the DVD, which I don't particularly care to have anyway but is does state that it's a 2 disc set.
Would all of the pre-order 'Remastered' editions be of the same sound quality? I would seem to think so.
Tower's Lineup of the Joshua TreeLike I said previously, Tower has come through for me very well in the past without any problems so I wouldn't hesitate buying from them again.