my hi spec 285mm drilled discs are cracked to fukk, and they are £195 to replace with grooved ones, £195 for drilled, or £145 for plain.
they also supply a spacer to move your caliper outto take the bigger disc. unless you are going for the 4 pot full kit??
i have just got some esc cos calipers, discs, pads and braided brake lines,,, for the same price of just the discs...