Whenever good screen deuls are mentioned, this one from Rob Roy...
http://www.youtube.com/watch?v=SVaslN1NiT0
and any fight from Ridley Scott's 'The Duellists'...
http://www.youtube.com/watch?v=YhwIrONyEzg
...seem to be thought to be the best and most realistic, by the professionals.
Which always had me thinking if Liam Neeson has experienced the best, he must have been depressingly aware of how awful TPM's choreography was.
btw both were done by William Hobbs, who has also done work on Game Of Thrones.
I think the duel from ANH could have been alot more dynamic. Not faster or more elaborate, it just would have been nice if it had taken place across the tractor beam generator platform or something... rather than a random empty corridor. It would also have added an extra element of tension as Ben would be fighting Vader to prevent him reactivating the tractor beam, so Luke could escape on the Falcon.