I like dhtem all. They were all good eps, but my absolute favorite would have to be the following in the order shown:

1. Neji vs Naruto

You get to see the development of Neji and the will of Naruto. Also cuz it's the first time Naruto calls on the Chakra of Kiyubi during a fight and he does it intentionally, not by his heightened emotions

2. Naruto vs Kiba

Again the character development of Naruto.

3. the Entire Hidden Mist Country series

Probably the best arc in the entire anime. only reason it's third is cuz i put it there