Personally I consider the rematch of Dooku vs Obi-Wan and Anakin in RotS to be the best of the PT and my personal favourite. It was brief, simple and elegantly choreographed.
I thought the short duel between Qui-Gon and Maul on Tatooine was the best of the PT.
I had forgot about that duel. The one where Maul nearly kills young Anakin by running him over for no reason.
https://www.youtube.com/watch?v=JMlUmUlu9M0
It felt like the duel closest resembling a lightsaber fight to the Original Trilogy to me.