I have the uncut and the director's cut, have not seen any theatrical cut for sale where I am.
The uncut version is longer by an hour and a half, so if you really really like sweaty Germans this is for you. However I prefer the director's cut (from the SUPERBIT collection -
check it out). As it is shorter, it is a little bit easier to handle in one sitting, especially if you plan to watch it more than once.
Also, the picture and audio in the director's cut have been remastered so that they are noticeably improved over the uncut version.