It's interesting that the OT duels aren't faring so well in this poll...they all had there moments too (ESB Luke/Vader almost poked it's way to the lead for me here) but after watching AOTC & ROTS and seeing how precarious this friendship borne out of a vow to a dying man and necessity to the Jedi was and how that finally towards the end forged itself into a genuine partnership based on mutual caring, trust & respect...it just gave an edge to ROTS. Yes, the "lava surfing" and effects were just over the top, but when it finally ended with those cries of "I hate you!" & "You were the chosen one..."...it truly became the duel of the saga....at least for me.