Ford Sierra RS500 Cosworth
Would you still think like that?
I must admit, the Saphs dont really float my boat unless its had some extras, but a modded or standard 3dr sierra cosworth is porn.
Also, turbocharging or supercharging a M3 lump is not as explorered as the cosworth engine
Lots more people will play with a cosworth engine than a turbo'ed M3 lump.
More of the shelf parts for the cosworth engine as well, things like this make a big difference when it comes to repairing or making it that bit more special for the track.
If it was me, I would drop a E90 M3 lump in or try push a M5 lump in