Based on the Manga, Shikamaru v. Tayuya is one of my favorite battles. Reading over it, I was so excited by the way Shikamaru simply remained several steps ahead of Tayuya. That kid's too smart.

06. Sandaime v. Shodaime, Nidaime & Orochimaru _
'Cause Jad's right, this battle's definitely worth mentioning. The sheer level of all of the Hokage were amazing. I won't list any more, damnit! .. I'll end up going through the whole damn series. Seriously.