whats up, just installed my new rotors from Brake Performance.com, the dimpled and slotted ones. and i have a horrible squeel as well as (i think the caliper clip) a grinding sound. is it a must to replace the clips? also i just got the rear rotors from the same site and everything. all ceramic pads. now will the ceramic pads cause this since the weather is still pretty cold? should i go pick up some semi metallic? anybody else have this problem?