I'm a loyal Tirerack customer, so I only researched 15 inchers for the 2007 HCH specifically, by using their scroll menus. There are several wheel models that come very close or lighter than the stock rims (I also weighed them in at 16 lbs on my electronic scale). Yes, when you get down to 10-12 lb wheels, they are very pricey. Almost all of the 15" Sport Edition wheels (Tirerack's in-house wheel brand, but actually made by reputable companies) are around 15 lbs...I think I found the lightest model (E3) at 14.5 lbs. Tirerack gives you the weight online for most wheels, at any size. Good luck!