I think Kell Brook is much more deserving.

Khan has the talent and speed but he just doesn't have the speed.

And before people say "OH MAYWEATHER DOESN'T HIT HARD, KHAN SURVIVED AGAINST MUCH BIGGER PUNCHERS, ECT", that's true, but he's never fought a guy with the speed, accuracy and skill of Mayweather and he's going to get hit with more clean, quality shots than the slow plodders were able to hit him with.