UFC 84 Main Event: Penn or Sherk?

[Matrix]

I've got Sherk by 4th round stoppage or decision.

As focused and driven as people seem to believe Penn is, I think Sherk's just as driven if not more so. He had legitimate complaints about the testing facility where the drug tests were performed, and he has maintained his innocence the entire time. The man's got mad cardio and he's really focused on getting that belt back.

I think it'll be a great fight, but I suspect that Sherk may pull it off.
Just to make it interesting, I'll take a two-week sig bet on this.