I just bought this after seeing the E30 M3 and Lotus Elise on an awesome hillclimb track(user mod).
http://www.youtube.com/watch?v=76fMHX52qVc
It's a phenomenal sim. The tire model is one of the best I've felt. It's also great to play a modern sim with DX11 graphics and natively supports 900 degree wheels. It's great to not have to fiddle with steering ratios to get the high rotation wheels to work right.
That track looks amazing, where did you happen to download it? I love the E30 M3 in this game handles so well.