I find the ST pads to work surprisingly well on the track. I agree - they will fade after extended sessions, but if you're running 20 minutes or so at a time, you should be fine (though your results will probably vary depending on ambient temps). They also don't last as long. I'll get 4, maybe 5 events before I need to replace the fronts. But given they're so cheap, I don't really care.
I'm installing a brake cooling kit soon and will be curious how that extends bite during sessions and pad life over time. I'm optimistic.
2009 E92 M3 :: Jet Black :: Fox Red Extended :: Carbon Leather :: 6MT :: JRZ RS Suspension :: RD Sport Sways :: StopTech Trophy Brakes :: Cantrell Brake Cooling