I think as mentioned new Forza 4 is the best choice for you Unikorn. And if you ever want a game focused only on pure racing I still recommend Project Cars 2 - in my eyes one of the most immersive PC racing games atm. It has dynamic weather, fantastic graphics, laser scanned tracks and plethora of cars. Also is pretty user friendly, you can set it up to be arcade easy game or almost pure simulation. It also can be played with a controller or even K+M (altho the last one is not recommended).