On a scale from 1 to 10, how good is the 'Dark Knight'?

The Dark Knight and Ledger's performance in the film will go down as legendary in movie history. unfortunatly it's his last, but it was his ABSOLUTE BEST! It will be the most tragic story ever told in movie history. The way he portrayed Joker was just so powerful and so believable. He made the movie. The "new" Batman movies are now my most absolute FAVORITE hero films with Dark Knight at the top. When I saw Batman Begins it blew my mind. Dark Knight did the same thing only infinite times more! If there were a number greater than Infinity on a scale that's what I would rate it, it's that good.