I've been asked by a friend to research "best" runflat for his 1998 corvette. We're in Michelin area here (upstate SC) and we tentatively think the Pilot Sport All Season are it. Kumho MX are a little lower $, but 60% the life. Vehicle is used to impress people and ride around town, not high speed. It has traction control, which he enjoys turning off and showing that it will spin the tires. OEs lasted 7+ years, 20,000 miles. Michelin has that "impress people" name to him. What would you folks recommend?