EBC rusts easily - i have not been to happy with them
Put it on both ends on my xt600z and the rear of the xtz750
On the 750 i've now replaced all discs again. This time from
http://mx-tec.eu So far done 12000km on the front and 5000km on the rear and they are very good. Think i paid ~200€ including shipping for all 3. They are not anything fancy like waves but just in a good quality and the right thickness. If i remember correctly 5mm rear and 2 4mm front