Living up north, like I do, why would you want all season tires on a CTS with the performance options? All season tires require you to make sacrifices in the summer and in the winter. I would never skimp on tires. Use the dedicated summer tires in the summer and switch to dedicated winter tires in the winter. This would give you better performance in the summer, and much more traction in the winter. Sure you can get by on A/S's in the winter...but youre buying a near fully optioned CTS. Why would you cheap out on the tires?