Any recommendations for which is the best spark plug to wack in..? Iridiums or platinums..? My car is purely a daily. "The major service Subaru performs, which do they use..?"

NGK PFR6B's is what were put in my GC8 by mechanics.

I preferred NGK PFR7B's as they helped stop a wide open throttle missfire problem i had. My car was running 24psi through a VF34 with a PowerFC injectors etc etc so it was mildly modified. If that helps.