An RR sounds like a fun thing for this track. That progressively-increasing oversteer is fun around a track like El Capitan... Maybe a somewhat power-improved Alpine? Or, if oversteer is wanted, but RR not, try the Lancia Stratos for some extra sliding, or the Hommel Berlinette for a slightly more calm expirience. The Lancia will start to drift whenever you get off the throttle - tight control and hard tyres are needed, since it's easy for this car to spin, or burn away the tyres. The Berlinette, like all MRs, will understeer under braking, but will be happy to do a nice, clean and quick speed-drift around a corner - this actually helped me improve laptimes around El Capitan and Opera Paris... Although, unlike the Stratos, it does those drifts only when actually willingly initiated (Lift-off, then floor it - straightens out in a second).