One thing I'll say about that scene in Return of the Jedi. For all that the story is old-hat now and all the problems Star Wars has always had with acting and script, it's a hell of an impressive scene of emotional back-and-forth, not just a neat sword fight with some lightning at the end.

And that's why the original trilogy and this particular scene of Darths & Droids are both better than the prequels. Sorry if I'm stepping on anyone's toes there, but I think I've pinpointed why the Anakin/Obi-Wan duel here is doing a lot more for me in comic form...