My choice is quite different, but I would have liked to see:
Charlie Haas & Shelton Benjamin vs. MCMG.
I think both of these teams have the potential to go down in history as one of the most well-formed tag teams in history, along with many others like the Dudleys etc.
I don't know about anybody else, but when in circa, the Worlds Greatest Tag Team (Haas and Benjamin) really really REALLY impressed me. They were always in such a well-balanced, fluid motion in ring and I don't think I ever saw either of them screw up during the match. It's just a shame that they were short lived and were part of Team Angle for the better part of their career.
MCMG, on the other hand, I can say the same for. If you've seen the series, then you know what I'm talking about. MCMG and Beer Money was probably one of the greatest tag series I've ever witnessed and I thoroughly despise TNA.
Worlds Greatest Tag Team vs. MCMG for me.