I think benzema staying in france for yet another year isnt the best of moves. He is without a doubt the best striker in that league over the past 2 seasons. I dont see what else he will develop in ligue 1. He should think long and hard about his move though. He could move to a big club but he may not get a guaranteed starting spot, since most big teams rely on more than one centre forward. On the other hand, he shouldnt move to a club that is on a lower level, such as robinho who moved to man city. He may be performing well there but his stock has dropped massively since moving to a club of man city's level.
Imo he should be looking at a move to a juve/valencia/a.villa kind of club. From there he can join the likes of fcb, madrid, man utd, liverpool or whatever team takes his fancy. I honestly have high hopes for this kid. And thats not just from seeing him in a few CL games.