Neuer is the best gk for 2 years now. No doubt. Even better than legends like Kahn, Van der Saar or Maier ever been. The way Neuer is reading the game and playing as the 11 field player comes to a revolution. He is changing the way gk performing. In future it won't be enough to be strong "at the line". new gk-generation will copy Neuer.
Courtois is also huge and in my opinion the second best gk. A great champion and still so young. sooner or later he will be the best.
The likes of Czech, Casillas and Buffon surely in decline. Especially Casillas and Buffon are really weak in these days. Buffon with very slow motions and Casillas can't controll his gk-area. Clowning around even worse than in past. Both shouldn't have start for their countries. They only played due to their name. We did the same mistake with Lehmann at Euro 2008.
I know americans love Tim Howard. But please don't you ever consider him as Top 10 in world. He is good, that's it. There is a reason, why never made it at any european topclub