STOP. Everyone just wait for the final, 8 movie EXTREME editions: which is the Ultimate editions, with even more extras, cast commentaries, crew love stories, on-location documentaries, alternate commentaries with the movie stars only their drunk, harry potter wand, collectible cases that transform into , the books on audio-cd, new cast interviews with their reflections on the whole 8 film saga, and, and, even MORE extra footage in every film! especially filmed just for the giganta release! (Since the actors are older when this part is filmed, it will turn out to be future Harry assisting events in the background to happen as they should to prevent a whole new alternate ending from happening, in which everyone else in the gang dies except for harry himself. It will all be completely legitimate too, cause they will convince the author to write a short, eighth book that explains it all!)
See, cause if you don't wait, your'e going to be quadruple dipping by the time this super special set comes along. =)