I just installed my winter tire/wheel set from Tire Rack and just thought I would post a photo. The wheels are 18" x 8" BE GTS-AV in hyper silver. The tires are Bridgestone Blizzak WS70's.
I really like the look... much better than the stock 18's. For one, the finish really matches nicely with the chrome trim. Second, they are lighter (in weight) and look it. If I thought I would keep my Q5 for more than a year or two, I think I would swap the tires and use the BE's for warm weather. Unfortunately, I'm already considering other options due to the lack of refinement in the power train (mainly the transmission). I'm taking the Q5 in this upcoming Thursday to have the adaptation software reset. Fingers crossed.