Originally Posted by Trevor@TireRack.com
For occasional track days, the sportline is not ideal, but it will give you more control of the vehicle and is better than stock. They are right, something like the H&R Super Sport or the Race spring is better for track, but it will greatly decrease ride quality. It's a little over kill for a daily driver with occasional track days if you ask me.
Hmmm, had 215/45/17 and koni coilovers on my cavy. That was not bad commuting but potholes and large bumps did kill. Though that had ~300lb ish or more spring rates and was lowered 2.5".
I guess i'll see about going for some rides with friends and see how there cars ride with springs/coilovers and decide if i can live with a harsher ride.