I've learned to wait on these things, although with this show it could be years
Want to buy the full, definitive set with all seasons. Not mix and match various seasons, some with extras, some without because another one comes out later. Let the whole thing settle down, not get version "A", only to have "B" come out a few months later, followed by "C" after that.
I bought four versions of "Aliens", three of "Total Recall", never again. Fool me once, (or more) "blah, blah, blah...."