I just talked to my mechanic and he says that the more dust the better. It tells him that the pads are working and biting. He says the hard pads get scary as they cause brake fade. That's his opinion anyway.
I have Kleen Wheels for new wheels I just purchased, but I'm afraid of putting them on because of possible overheat problems. Plus, when I did a test fit on one wheel they seemed to rub.
Anyway, looking forward to more suggestions.