With normal driving, how long will the OE brake pads and rotors last on the car? I have 48K on the car, and am not sure if they were replaced already since I have had the car only for about 10K miles. The brakes are not the best since when I brake hard sometimes it feels like its fading, and starting to make alotta squeaking sounds! I was thinking of putting on the Stillen metal matrix pads, the Stillen cross drilled rotors, and the stainless steel lines. One question, is it really necessary to replace the rotors witht he cross drilled ones? Or will the stock rotors be fine with these pads?