have a 2001 boxster S, has about 65,000 miles on it. got it used at about 48,000 miles. previous owner didn't take good care of the brake pads, so it started to wear on the rotors too. so had to change all the brake pads and rotors at 60,000 miles or so.
I definitelty will keep a closer eye on the brake pads. OEM rotors for the "S" ain't cheap