Had the S and R tunes on my own car.
S tunes are fine for the street, not so much for the track.
R tunes are very uncomfortable and definitely not designed for out roads. Changing spring rates will only get you so far, it's the valving which you need to change.
As a comparison, I had made custom Bilstiens for my car with spring rates of 14 F and 9 R. Around town they ride just as soft as stock suspension, believe it or not. There is a lot more to it than just a cheap and easy spring change.