Have you used PS4S in the wet in anger? (or even the standard PS4 for that matter) If you have I'd be really interested in what specifically you were not impresssed with. It is easy to be a hero in the dry (PSS, Cup2 etc) but to hang on to most of the performance in all (summer) conditions is impressive IMHO.I've never had a Michelin tyre that I was impressed with. They seem to be very hyped up for no reason.
I like Continentals for wet braking and winter tyres but they don't last long if you do miles.