I considered same style wheel form Niche, but couldn't find any pics on a X5 or any SUV. I was afraid the wheels might look a little small on a car with a big fender gap.
I just googled and found this pic.
http://mulpix.com/post/1022734592269239603.html
doesn't look too small for such a big car. Might be dropped though.
Either way you should go for it!