I always run two sets of wheels and tires on my vehicles. The van was easy as when I bought it, I found a sweet-deal on factory stock wheels for $400 OTD. So while I would have loved to let the wife rock some cool summer wheels, I wasn't going to pass up a factory set for so cheap, thus the look there never changes.
When I picked up the S4, I cut corners a bit on my summer set up as I also needed to pick up a third set for track days. Having to drop so much at one time I decided to stay with the factory size/width. If I had to do it over, I might go wider for my daily summer shoes, but it's too late, I'm not buying new ones.
Summer
Track
Winter
The above cost me enough.