I replaced all 4 discs and 8 pads on my XE with EBC Brakes stuff. The original equipment discs corroded very badly and by 20k miles were also very grooved and had thus worn out the pads. So far (about 7k miles) the EBC discs and pads ("Redstuff" ceramic) have been excellent with no sign of corrosion or any grooving. The Redstuff pads also make very little dust so the wheels stay clean, and braking performance is excellent. EBC brakes are not the cheapest, but I think the premium price is worth it.