I was using CC-Rs on the GTR, and I found them pretty good even from cold.
I got a fair bit of fade at the end of the front straight at Sandown on a 35 degree day after 4 laps.
I had only one week prior bled the brakes, using Castrol RBF (or whatever it's called) brake fluid... Using the standard drilled rotors.
Don't know how you'll find them, I managed to blue the rotors
Admittedly Sandown is tough on brakes, and I'm a track pansy....
Food for thought that last time I went out on Sandown was using RB74s (around 25 degrees) and didn't get (as much) fade.
See how you go.
I'm thinking of running Ferodo DS2500s with the AP calipers on the front - what do people recommend for the rear - the same?
Cheers