[quote name='AshesofWake']oh gosh. I wonder if Solaris blu ray is worth the upgrade....I have the original Criterion Dvd release though...[/QUOTE]
The blu-ray is quite well done, with a solid HD transfer (within the limits of the film stock, of course). Also, if you have the original DVD release, there are some significant differences in the transfer -- most notably, Criterion apparently discovered that the black and white scenes were actually (as Tarkovsky wanted them) supposed to be tinted blue, and the new version corrects this. The extras are the same. I'd say it's worth the upgrade, if you like the movie enough (and if you're even asking this question, I assume that you probably do).