I have an '04 545i with sport package. It comes equiped with mixed size wheels, 18x 8.0 front, 18 x 9.0 rear wheels, 245/40R-18 front, 275/35R-18 rear performance run-flat tires. The tires are summer rated only. My question is this. I live in Maryland where we can have hit or miss winters, when it snows we get it pretty bad, but you can't always count on a snowy winter. Do I swap out the equiped tires for all season radials of the same size, or do I puchase a set of four 18*8 wheels equiped with snow tires for the winter months (November - March)? I really like the look of the bigger rear wheels, but I like the look of the unwrecked BMW better.