22s
I have 21s on my GTS and the streets here in NJ give me an *** whooping. If you can swing it, get a second set of 20 or 21s and throw on some thicker rubber, then use the 22s for everything else.
I have 22's on my Turbo. I think the ride is fine. I'm sure the air suspension has a lot to do with that. As far as winter tires, you're right, they're hard to come by. I ended up ordering a 20" winter wheel-and-tire set when I bought the car.
I'm in Chicago as well and have the same issue (car is currently on order and I'm having second thoughts on the 22's). In any case, Pirelli DOES list a winter 315/30-22 (rear tire) on their site, but they may or may not produce them based on demand. For what it's worth, I placed an order on TireRack for the winter set so that it would populate in Pirelli's orders. They'll only charge your card if the order is filled. (In my own self-interest), I'd encourage others to do the same.


