I have a red '05 Limited and I purchased chrome 18" Lexus RX330 wheels and the corresponding tires - 235-55x18 Michelin Energy MX4. The car looks really sharp and this wheel/tire combo has the advantage of being practically the same OD as the Highlander factory 17" wheel setup, so there are no speedometer or ABS brake issues. The wheels also have the same offset as the Toyota wheels, so front end components should not be adversely affected. Check out eBay for the wheels. They came from
www.oemrims.com. I wound up buying the tires from my local Lexus dealer, who came VERY close to the prices quoted by Tire Rack -
www.tirerack.com. I had a discrete gold double pinstriping (painted on) added on both sides to go with the factory Gold Package, and also had the two front windows tinted a bit. Not as dark as the privacy glass, but darker than stock, and the vehicle has drawn quite a bit of attention, especially from other Highlander owners.