What tires came on your 18" wheels from the factory?
 

I'm trying to sort out a vibration / compliance issue on a 2003 Boxster S with 18" wheels. I want to know what brand and model tire the factory put on Boxsters delivered with the 18" wheel option and your general impression of their performance.

I'm trying to decide between the Bridgestone S-02A, Michelin Pilot Sport Rib and the Pirelli P-Zero Rosso, all with the N-Spec.