18 x 10 race wheel recommendations
 

I race a Spec Boxster in PCA and GTS2 in NASA until we get more SPBs fielded. For GTS2 I run staggered Hoosier R6 (245/40-17 and 285/30-18) with OEM rear wheels on the front and 18 x 10 TR Motorsports from Tirerack on the rear. It looks like they don't sell this wheel anymore so I'm looking for a reasonably priced, about $300-500 each, light rear wheels. They don't need to match the fronts and color is not an issue.

From my limited research it appears that many are running OZ's, which seem quite light and may fit the bill if there are not other options. What do you suggest?