Cup 2 or R888/R for street?

I live in Northern California. No rain for 8 or 9 months out of the year and generally sunny and warm.

I have a G80 M3 Comp. I am getting some all-season PS4s as "winter" tires.

Aside from wear/cost, is there any reason to side with a normal summer PS4 or PZero over a Cup 2 or R888 for a summer tire? What are the risks of going for a track oriented tire like these over a summer performance tire if there are no wet conditions?