spring rate help

[YellwMonky]

After searchign around a bit, i gave up and decided to just ask.

I'm going in to buy the k-sports coilovers they're having a GB for @ NICO. But I just have a question I was hoping you guys could help me out with. What is a good spring rate for me?

I drive an s13 coupe. It is my daily driver, but I don't care too much about the ride quality. I don't want my cd player to skip when driving over a cigarette butt, but a little harshness is fine. My biggest concern is choosing a spring rate that is best for "grip style" driving. I'm not into drifting like most 240sx owners. My biggest interest is taking this car to the track & tight turn mountain passes. The available spring rates are 3.5, 5, 7, 9, 11, 13, 15, 18, and 22 kg/mm. Can anyone help me out?

Thanks in advance.