Meh, Codemasters' racing games stopped appealing to me after TOCA Race Driver 2/Colin McRae Rally 4.
Wait for Project Cars if you want more.
That was before the new Ego engine 3, I think Race Driver GRID was their 1st Ego Engine 3 game, eversince then their performance has produced much more realist Pseudo simulators, unlike that Gran Turismo and Forza crap. I think DiRT 2 was Codemasters at their very best. And Gymkhana in DiRT 3 was Phenomenal !