Frank Shamrock vs Tito Ortiz (UFC 22).
The fight that got me into MMA. A great chess match, where Shamrock executed an excellent gameplan. He knew Ortiz was bigger than him, so he decided to tire him out. Maurice Smith is an excellent cornerman here, as he & Frank communicate with each other constantly throughout the fight. This fight gives you a little bit of everything, and it's awesome.
http://www.youtube.com/watch?v=6jGBpfb2VXQ
Not the full fight, just the last round, which was a great round.