Now that you have an actual motorsports caliper I would highly advise looking into EBC's SR-11 or SR-21s pads.
They are THE ONLY pad that will take some insane abuse on track, still be whisper quiet on the street, and work just as well at 0 degrees as they do at 1000 degrees.
Myself and a handful of other guys run them in time attack and I seriously have zero complaints. You honestly won't find a better pad, if you happen to have a caliper they fit in.