I pulled the trigger today with a local shop that sold the 20" Toyo Proxes... $800 tires, totalled with tax it's $1k installed (when the rims get here) and swapping the existing sensors in. The replica rims I got on ebay today from Wheels and Caps (10"/11")- very reputable after researching for hours. Total cost $1016 tires/install + $1086 rims shipped. I still need to get the wheel caps and fender flares for ~$250. I can't wait to finally get 214s on this thing.

I will see how it goes for a few weeks and see about selling my 19" sports with Michelin Latitude runflats (500 miles).

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'08 X5 3.0si - Alpine White / Saddle Brown interior
Specs: Sport Pkg, Premium Pkg, Tech Pkg, Comfort Access, Aero Kit, Style 433 staggered 20s on Conti DWS
Mods: Carbon 35 tint, LED angel eyes, GP Thunder 7500k fogs, H&R 20mm/25mm spacers, clear reflectors, gunsmoke-tinted taillights
Coded: Digital speedo, windows/sunroof/tailgate close via keyfob

X5 pics at Flickr