Yoda vs count dukuu just simply ruled, long fight, intense, yoda little org :P jumped round like a madman, but that wus really cool
btw, me new member :P

Basically it comes to this: the 2v1 fight from Episode 1 was fast and intense and had style in terms of the choreography.

But the fight between Vader and Luke Skywalker had style in terms of the whole atmosphere. Luke knowing he has to face and maybe even kill his own father etc just gave more weight to the situation.

So I vote for the Luke vs Vader fight from ROTJ.