B) I have a 2002 LS 430 with 6K miles and have the same Dunlop 225-55/17 SP270's which run flat spots initially, but after 5 minutes are gone. The wheels and tires are boring, but quiet. I traded my BMW 740 iL in and enjoyed the wider wheels and Continental Conti 235/60R-16 tires very much. They were quiet and gripped like steel, even in the wet. Does anyone know what an upgrade to the GS430 235/45R-17 wheels and tires would do to the noise and ride of the LS 430 B) ?