Congrats - I too did not get the 20"s but I now wish I had. The extra 1K would have been a lot cheaper and you could always pick up a set of 18" takeoffs for winter.

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2008 BMW X5 4.8i (E70)
Alpine White, Burl Walnut, Nevada Black, Sport Package, Cold Weather Package,
Premium Package, Technology Package,
Rear Climate Package, iPod adapter