im a nvidia fan im confused what to buy among these ..im mainly confused because of physx ..because if games demand physx for those eye candy like mafia 2 and batman arkham asylm ..they really looked great with physx and normal without physx ..but my monitor res is 1920x1080 i want to play all games in this res without lag..will the use of physx will be noticed visualy when playing games like crysis 2 ..and the upcoming batman arkham city..