2nd pair of new brakes in a year grinding - -03 Honda Accord

6/08 Car inspection revealed I needed new rotors and pads. Replaced. (Ceramic - Non Honda parts) Ok until May of this year '09. Started grinding/rubbing noise when I would brake -mostly when I am close to complete stop. Mechanic warranted brakes and put another pair on. (still ceramic) Grinding is still there and actually may be a bit worse. Have since taken it to 3 mechanics who have all said that brakes are fine and I have to live with it. Is there something that can be done to stop the grinding. Honda said they could replace with their organic brakes for $480.00 and it might stop!