I have unknown model H&R springs with Koni Yellow shocks on my daily driven and tracked car. I suspect the springs are H&R sport not race as they feel a little soft on the track. The Konis, even on their softest setting, are still a little hard for the street but nice on the track. Paired with stiffer springs I think the Konis would make a good setup for strictly track.
I would like to get a set of Bilsteins sports n the future as I like the idea of being able to rebuild and re-valve them myself. You have to send the Yellows back to Koni to get re-valved.