rcf8000

I've read a lot in these forums about people changing out the run-flats with Michelin Pilot Sport A/Ss, but I haven't seen where anyone has bought the Dunlop SP 2030s. This seems odd, since the Dunlops are OE on SC430s without run-flats. I thought all SC430s were being delivered with run-flats these days, but evidently not, since the comparison test in the Sept. issue of Road and Track had an SC430 with the SP 2030s. Has anyone out there replaced their original Bridgestone run-flats with the Dunlop SP 2030s?