Bisping will never get a shot at the Middleweight title, nor could he ever beat a top 5 middleweight. Sonnen, Okami, Stann, and Belfort would run through him. Silva would probably kill him.
That being said I think Bisping beats Mayhem.
Faber - Franklin - Velasquez - Hunt - Machida - Condit
Credit to M.C. for the sig!