And another thing, if your rotors look rusty or worn, you can replace them at tirerack.com also very cheaply, I got 4 Brembo OEM style replacement rotors, 2 axel sets of EBC green stuff pads shipped to my door for about $260 plus $90 at a local brake place for the install.
Link to the brembo oem rotors:http://www.tirerack.com/brakes/brakes.js...placement+Rotor
If you are going to pay to replace the pads, you might as well get it all done at once. The Brembo rotors are $22 each for front, $18 each for rear. You will not find a better price than that ANYWHERE.
If you plan to do this yourself, I'd suggest getting new rotors, since it will only take you about an extra 5 minutes total to install them.