Which is the best Sly game to buy on PS3?

I don't have time to play all!

So which do you pick to be the best sly game? (Sly Cooper and the Thievius Raccoonus, Sly 2: Band of Thieves, Sly 3: Honor Among Thieves)

I am guessing Sly 3, since they must have improved stuff from Sly 2/Sly?