Well the top 5 spots are pretty much a lock with Joker, Nadal, Federer, Murray and Ferrer.
6-10: You could see various players like Tsonga, Soderling, Del Portro, Fish, Berdych, Tipsaravic, Monfils, Dolgopolov, Roddick (if healthy), and Simon.
Then there's guys who I think play a better all around game then how Raonic plays . Tomic, Lopez, Verdasco, Wavrinka, Gasquet, Karlovic, just to name a few.