Khan has had some good wins, but Cotto's technique is So much better than Khan's. I can't give Khan the nod for that reason alone. Khan is more naturally gifted though. I'd like to see the two of them meet at 147. That'd be a great fight.
I think Cotto destroys Khan at 147. Also Maidana & Judah really isnt much better than Mayorga/Foreman... And thats just taking into account their last 2 victories, overall Cotto is so much more proven.