now usually i don't rebuy the same movie on dvd if they release a special edition, but I'm gonna make an exception for this. this time it's a 2-disc dvd, with the second one filled with special features. the first release dvd didn't have that many special features, so that's a plus. Also there's a whole new commentary with the cast, in addition to the one with just Joss Whedon. Plus, the cover art looks a heck of a lot better.
collector's edition cover
compared to old one:
now with the new one, Serenity is actually front and center in its title movie, instead of off on the side of one corner like the old ugly art.