There's Ocpmovie's Classic Edition, which is pretty much the original version restored in near-DVD quality. Stellar!
Then there's ADigitalMan's version, more free-form with two entirely NEW sequences he concocted himself. Sweet!
Then there's my version, which I just finished a while ago. A blend of OT and SE. http://originaltrilogy.com/forum/messageview.cfm?catid=9&threadid=2666