The E92 will very likely be available for download on Forza 2 anyway, with the E36 and 46 M3 being in it already.
I hate what NFS has become. The last decent one was Hot Pursuit II, with the exotic cars in cool locations. The handling was arcadey, but the camera did a really cool thing of pulling away during acceleration, to give the impression of torque. And it had an E39 M5 and Z8 in it.