Amir khan vs keith thurman looks a great fight though who would win would love to see this fight happen alot of potential great fights in this division brook vs maidana too also think brook would win as too skillful
I wouldn't root for either I personally like Thurman a little better ......but I think Brook has the more solid chin of the two, so if Brook catches Keith with something big, it might be Lights Out for Keith.
I will answer the OP's question with another question: why do you think Khan has only faced former champions who can't punch (and was still hurt by Diaz and Collazo) since he lost to Garcia?
If i had to bet, khan outboxes him in the early rounds until he gets hit with something big and thefight eventually gets stopped.