I'm about to replace the brake rotors for the second time in 60,000 miles. It's been suggested that I should buy aftermarket rotors instead of the factory ones that don't seem to last. My wife is the regular driver and is not hard on the brakes so they should not warp like they do, but I am hard on the brakes when I get the chance to drive it. Any suggestions on which kind of aftermarket rotors to buy? Thanks.