what is a reasonable cost to replace brakes, both front and back?

jag suggests replacing pads, rotors and sensors. aftermarket parts are not always the best. we use oem parts for this. fronts are about 400 rears are about 450 Roy

Roy is right, these cars frequently seem to need front rotor replacement and front spindle wear/excess front wheel bearing play is also common, his estimate is approx what we charge on that Jag in CA.