If I had to pick the next guy to occupy a top 2 ranking, it would be Soderling. Hes pretty good on all surfaces and has improved his game on fast surfaces (Paris Indoor). His first serve and forehand are huge weapons and his return is very underrated. Probably wont win the AO but he is my dark horse for RG. Knocking on the door 2 years in a row means he knows how to win there.