Yes, PSS9s are too soft for track cars. If you street and track your car they're fine but if you're trying to catch GT3s you should get the motons or also look at JRZ clubs and Ohlins. The clubsport motons can be had for about $3500. You just need to decide if you want to spend a lot of time on set up and tuning as well as maintenance. For a dedicated track car it's a no brainer, it's seems like you track enough to make it worthwhile. The worst feeling is buying the cheaper thing then having to buy the other afterwards anyway. I did that on my M3 and won't make that mistake again. Just do it right from the start if that's your goal.