Brian,
I'm not sure yet. After I did the fronts I still heard that telltale sign of a pad wear indicator contacting a rotor and making that horrible noise. I wound up doing the rear discs 2 days later. For the rears I just used some cheapo semi-metalic pads. Like I said above, I'm getting a slight squeak from time to time. I can't tell if it's coming from the backs or the fronts. I'm hoping it will go away in a thousand miles or so. If it doesn't, I'll start by going back into the fronts and putting some disc brake quiet or disc brake grease on both sides of the inner shims. I didn't use anything this time just as an experiment. I'll keep you informed.
Mike