I now have some feedback from using these rotors on the track...
They worked as well as the stock rotors did. The KVR Rotors and Performance Friction pads provided fade free braking.
My only concern is heat stress on the rotors. Take a look at this photo. There are already noticeable heat stress cracks after 2 days (total of 8 x 25 minute sessions) on the track.
I'll keep tabs on these for succeeding track days. As it looks, I may only get 5 or 6 days out of them.