I am very happy with my Bridgestone high performance ALL-SEASON tires. For the street they are hardly a performance compromise, they last 3x as long as the michelins, and are perfect for cold, and wet days (even in the snow). They are not at all noisy and cost 1/2 as much as the michelins. Of course they are the correct size as well - 295 width on the 19 inch wheels.
Unless you dump the clutch you can not break these tires loose, even (and expecially) in the rain. You would have to corner like a madman on the streets in order to notice a traction advantage vs. the summer tires out there. It is a great way to make your 997 a daily driver again. Having put over 150 K miles on a 996 and 997 I will not go back to michellin as they are great for about 4K Miles and then they get noisy for the last 5K miles.
I know - ALL Season tires on the 997S - but those on this forum who have tried them have made mostly positive comments. I certainly like them but then I am very practical when it comes to Porsche ownership and am not easily sucked into spending money for the sake of spending money (bragging rights etc.)