Note also my DRC was renewd under extended 5 yr warrantly. The suspension on the RS is crap in my opinion. Some owners ditch the DRC and go aftermarket set up. Take an RS up a wide road and do some mild slaloms at about 50mph. Feels quite sloppy compared to doing the same in M3.
RS have superior brakes though. 8 pot front callipers. New front disks and pads are a snip under £1200 here in uk...
Try both cars mate