If you want to stick with the 763M wheels, the PSC2 are the best option for a street/track tire, the CS was actually designed and tuned for those tires.
My car was mistakenly delivered with the PSS, so I drove on them for a little over a week before the dealer swapped the PSS for the PSC2, the PSC2 make a significant difference on how the car feels and behaves.
That being said, I find the PSC2 rather costly to use as a regular track tire. I have a dedicated set of Apex EC-7 wheels shod with Nitto NT01 in 275-305/35R18 sizes, I find them to be an excellent overall compromise for dry track use.
BTW, I'll be at the Glen with PCA in two weeks, what an epic track
