Glad to see this thread has really revived in the last few weeks, it was really slow going for while.
ROTJ might just be the most exciting of the whole series to see edited up. ANH and ESB are just polishing up masterpieces, after all, and the prequels will just be very different to see changed. ROTJ's changes are shaping up (provided some of these big ideas are both feasible and used) to be spectacular.