I agree the 28mm rotor is a nice compromise between stock and 32mm hefty rotor. However the 28mm selection is pretty sparse. It bothers me that the only rotor we can pirate from the 951 cars is from one model year. I suspect that in the years to come, this rotor could get expensive since it's from only one year of production.
There are of course other brands to choose from. AP Racing makes some 28mm thk rotors, as does Brembo, and they are NOT cheap. Wilwood makes an HD that is 298x28, but the size of the rotor face is not big enough which would create some pad overhang if this small Brembo caliper is used. I'm sure there's plenty of
Wilwood calipers would fit a the 298x28
Wilwood rotor just fine, and probably save a good buck by avoiding the hefty cost of VCI modifying the Brembo calipers!