also, while the S14/15 may be light and corner really well, the R33/34 is probably the most comfortable while still being sporty ,it will also hold the road better at top speed, so in effect it is the best handling in some ways.
The thing is it really depends what you want the car for, if you want a sprint track car then the lightweight and more nimble handling of the S car would be your choice. But if you want a more comfortable and quiet yet still very fast car for the street or maybe long distance road races then the R car is a better handling choice..