Kuhmo's handle really well. I had the 712's and they gripped nicely.
However, Kuhmo's treadwear sucks. the 712's I had, lasted me 15k, and were originally rated for 30k. And I don't drive that aggresively, or track my car yet.
I think you will like the tires over all, I would just be careful of how they wear, did you get a traed wear warranty?