Forrest Griffin - Stephan Bonnar (Not skillful by any means so it'll be snubbed a lot by the hardcore fans but damn, that was exciting)
BJ Penn - George St. Pierre
BJ Penn - Matt Hughes II
Matt Hughes - Frank Trigg (I think this was a rematch too, but I've only seen a replay so I wouldn't know)
Caro Parysian - Diego Sanchez
Chuck Liddell - Tito Ortiz


To be honest, I have a hard time remembering specific MMA fights. But all those are awesome, especially the first 4.