You look to have a pretty good lip on those rotors. BMW goes by rotor thickness to determine replacement needs. I don't know the exact specs, but most likely you'll need to replace them. They're designed to be replaced with the stock pads.
Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."