NISMO S-Tune all day long
Time was I would agree with you all day long on this one but, having S-Tune on my car, I feel if you are going to take the car on track more than occassionally, it is the wrong suspension type for the car.
On the Nurburgring the suspension is fantastic, but on any other track I have driven I find the suspension to be too soft and feel there is a lot of lean in the corners.
S-Tune is fantastic for road but I feel too compromised for track.
I would love to argue that my track driving was getting "better" and I push a bit harder but not too sure.
If you are going to be using the car more on the road, S-Tune is the way to go though. Thats what my initial intention was but if you will be progressing on to track think seriously about it and whether another suspension setup may be beneficial.