naruto vs. neji, naruto vs. gaara, naruto vs. sasuke- all good fights new elements in all three, neji battle was the kyuubi chakra for the first time controlled. gaara battle gama bunta fighting. the sasuke battle was what i had been waiting for since the roof top duel.
chouji vs. jiroubou- i loved this fight, chouji was so damn cool.
3rd vs. orochimaru- this fight was awesome, they destroyed it in the anime but in the manga it was really cool.
itachi/kisame vs.asuma/kurenai/kakashi - great introduction for itachi, gave us a feel on how strong itachi is.