Not seen Flair/Savage in sometime, but agree with Yeah
about Cena/Umaga and Eddie/JBL deserving high regard. Would probably have Punk/Cena MITB, Angle/Austin Summerslam, Mankind/HBK Mind Games and Cena/HBK Wrestlemania 23 really high as well. Then there'd be a ton of matches which could replace one another to fill out the rest of a top 10 and top 20.
Edit: Oh dear lord at these new usertitles, I'm feckin Petey Williams. Gonna have to start eclipsing Pyro in terms of posts per day to rid myself of such shame.