I think Cain's ahead of Jones, but behind GSP.
Not sure at this point where I'd put Aldo, but probably at #2 between the pair of them.
ETA: Now that I think about it, I'd probably have him in the top five, but not #3...
"I looked into his eyes to let him know he was done - and there was nothing there. It was like I was staring into a void. It kinda psyched me out." Brett Rogers on Fedor.