Congrats on the buy, and getting it shipshape, Bristol fashion, etc. The 20" 87s are very desirable, and give you access to more tire options. Unfortunately, they are hard to find. I looked for them for a couple of months [internet, Craigs list, etc.] and they get snapped up quickly at premium prices. As I recall, one internet retailer sells refurbished 87s for around $375 each, when available, if you include shipping. I ended up getting a great deal on E70 18" style 209s to mount summer performance tires; mine was already running 18" wheels. See other options on bmwstylewheels dot com.

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2006 X5 3.0 6-spd w/Evo UUC ssk
sport/premium pkgs
born Valentine's Day, 2006.