I've had my '07 United Gray w/ DSG, 18" wheels with the Continental summer tires for 1 week. The car is great, and the tires are nice and sticky. It's only September, but I need to get winter tires and wheels. I have been on some web sites that sell tires and wheels, and it seems I can only get 16s and 17s. I would prefer the 17s. Any suggestions for a good winter tire and wheel?