It can be a curse to be an early adopter of new tech... I've had a DVD player since way back in 1999, and this movie was one of the first ones I added to my collection. Even in it's original DVD release it's one of those movies you use to show off your big-screen-surround-sound system. I flirted with the idea of purchasing the Superbit version a year or so ago, more out of curiousity about the format than anything else, but now ANOTHER version of this flick? Ugh.
I see this happen again and again, and it's the reason that I now wait 6 months to a year after the release of a DVD I'd like to purchase before I lay down my cash. Within that period it's almost certain that a "ultimate" version of said DVD will be released. Having said that, I was very pleased to see the multi-version release of Spiderman 2 recently. Personally I think that's the way to go: Release the basic, special edition, and Superbit versions all at once and let the consumer decide which one they want.
Maybe one of you can knows what the current record is for DVD rereleases? From memory I can't think one that has had more versions than Army of Darkness, which I believe has five