I've got warped rotors from Brute Stop pads(I beleive they overheat rotors) , and am going to go to diff. pad tomorrow, how are ceramics? Auto store says $40-$50 a set and I'm gonna need to have rotors turned too. Also geez! I forgot, on a 92 XJ 4x4 w/ P/T NP231 case, do rotors just pop off when you remove calipers, AND are bearing imbedded in rotors? Also rotor prices vary from $20 to $50 each - how are the $20 rotors - what is difference in quality/price? Thanks, Heinz