I talked to my friend who is a INter fan.He thinks that Ceasar is the best in the world and Valdes is not even top ten.
I told him to watch the Valencia match. He kept us from losing 3/4-0. IMO he is the most improved Barca playing in Pep's reign. I would say Messi, Iniesta, Pique and Henry come very close but if you watch him a couple years ago and watch him now, i get the feel that i'm watching a completely different keeper. Now he has more presence and a commanding feel on the pitch. I'm not saying he didn't have this before but now people are taking notice.
As for the national team arguement, Iker is invincible. No. 2 should be between Valdes and Reina. I know Deigo Lopez is a very good player but he has been making some mistakes (well the whole of Villarreal have) and hasn't really won anything. Valdes has won 2 zamoras along with 8 club trophies.