Well, I had my P6s for a week on my T5 and besides being a nice quiet tire, there really is not much to like. I am one of those who would never own an all-season tire. Mediocrity at the sake of saving money is not my cup of tea. Plus, in Canada, you really should have winter tires, so why have all-seasons for the summer? The P6s give up way before your suspension wants to.
Anyway, a week later I got a credit for my P6s and put on Dunlop SP8000s, same size. Like night and day. The ride is different (firmer and more confidence inspiring, seriously), the brakes are now better than ever (though annoyingly grabby) and they are very quiet. Best of all, they can be had pretty cheap. I had them on another car before and I am once again very pleased with these tires...the car feels like a true sports sedan, and the tread looks nasty, makes the car look more sinister (picture black on black with tint and an aggressive tire tread).
Let me recommend staying away from a certain tire. The Yokohama A520. Looks unbeleivable, is cheap and the noisiest things I have ever heard. I don't know hoe they are even sold. My wife's all-seasons were done so I went with this summer tire, and the grip is enormous, but the tire noise is a joke. Good thing she likes the radio turned up!