If I were to buy any PS3 game, regardless of price, which one would be best?

Some Great games are Resistance: Fall of Man, Resistance 2 (The guys who made the Resistance series made Ratchet and Clank), Uncharted: Drakes Fortune, Heavenly Sword, Killzone 2, Call of Duty 4: Modern Warfare, Call of Duty: World at War, Wanted: Weapons of Fate, 007: Quantum of Solace, Little Big Planet, Metal Gear Solid 4, and many others that I don't remember right now.