What some people fail to realize is that you cannot be the best side in the world without a world class shotstopper. Look at the past "great sides" and tell me who they had in goal.
The Juventus with Zoff, Buffon and Tacconi.
The Man United with Schmeichel.
The Arsenal with Seaman.
Bayern München with Kahn.
Nottingham Forest back in the day with Peter Shilton.
The examples are many.
I think one of the reasons why Liverpool struggles to win the Premiership is the fact that they have sorely been lacking a world class goalkeeper for quite some time. Dudek was brilliant for them in the CL campaign, though.
For me, it's one of the most important positions to make sure you fill with a brilliant player.
We have the best of them all and his name is Gianluigi Buffon.
I understand why some people would be tempted to switch him with Kaka (in theory) seeing as exceptional a player Kaka is, but I'm not one of these people. Buffon is too precious.