I plan on getting a 17 inch wheel and tire package from Tire Rack this winter. I saw one with wheels and tires (runflat) for about $1200. As a comparison, my dealer gave me a quote of almost $2200 for a set of 4 wheels and tires (17 inch BMW OEM wheels and same runflat tires).
2008 BMW 535i Space Gray, Black Leather, Dark Bamboo Trim| Sport Automatic with Paddles | Sport Package
2008 BMW M5 (gone, but not forgotten) Space Gray, Silverstone Merino Leather, Madeira Walnut Wood Trim | 7speed SMG | All options
Mods: Corsa Exhaust | RPI Ram Air Intake | H&R Sport Springs | Rogue Engineering 12mm spacers