R-rated tires, which ones do you use?

[Ripper]

I'm about to get new tires to this season.
The car is used as a track day car and some road driving (about 60% road, 40% track). I still just have one setup with wheels, and I won't go for another setup right now since I don't think it's necessary.

Anyway, are anyone in here using R-rated tires for the track? What do you think of them?
Anyone with experience of the new Nitto NT01?



Come on, give me your opinions...