Jonas, if you're spending a significant amount of time on the track, a set of cooling ducts would go a long way towards preserving the health of your brakes. A little driver mod never hurts, either.
I'm not sure which wheels you might be running, but if you're also considering a brake upgrade, the Boxster calipers are always a nice OEM+ direction to go in. I've seen them mounted on many vehicles due to their popularity and durability.
Let me know if you have any questions, and of course, you can find our entire catalog of brake enhancements for your Targa
right here.