I have a 535 staggerd set up with a new set of Michelin AS3's. I went with an all season tire for the handful of days we get frozen precipitation. After 2400 miles and replacing two out of round rear tires. I now have a tire noise between 70-80 mph. Tire rack switched them out and I have a set of Michelin PSS sitting in the garage waiting to be put on..... As luck would have it, it's sleeting today!
I also have a BMW mobility kit and a dynaplug I carry in my trunk. I haven't used on a car yet, but it fixed a motorcycle tire in a flash. No glue necessary and it's all in a self contained tool that's refillable.
http://www.dynaplug.com