tonight after few miles i heard mad noise from my rear brakes, its something like hits the metal... i mean real mad noise! My buddy said that it is the pads... the thing is my rear pads was bad but i didnt want to change them, but now i have to! what pads are good for the rear? I heard raybestos are good... i dont want noise like my HAWK... can i get raybestos from pep boys and for how much? pls i need help! thank you guys...