I've used P-Zero (assymetrical), Michelin Pilot Sports, Yokohama A spec and some Federal crap. Forget the last 2. Cheap, last long but that's not what performance tyres are about. P-Zero seems to have a stiffer side walls than the Pilot Sports. The rear end likes to come out more with the P-zero while the pilot sport just squats and grips, grips and grips. It's hard to find the limits of the pilot sports on the road so may have to so one last track day. The Michilen gets my vote.