Yeah, my X5 winter wheels are much more "plain" and easier to clean than the summer M wheels. They are still OEM BMW wheels, made for the X5, but non-staggered and wearing all seasons. A lot of grime gets on/in the wheels in winter, and I obsess too much to tolerate it being too dirty... so I like something easier to clean in cold weather.
Also, consider checking eBay for a set of X3 pull-offs. They are bound to start appearing soon.