BEST GOALKEEPER: CASILLAS OR BUFFON?

Taking advantage of the fact that SPAIN plays ITALY next Wednesdaynight at Elche (Spain) in a friendly International game, Spanish Sportsmedia (eg. "Marca"), ask the question:Who is the best goalkeeper in the World at the moment, Real Madridplayer CASILLAS or Juventus player BUFFON?This is obviously a media hype exercise, but what´s your thoughts?Others that need to be considered as well?