but not too light...
there's a point where sacrificing too much weight in Michigan is a big mistake, because at that point, structural rigidity goes out the window. as an example, i wouldn't go under like 15-16 lbs for an 18" wheel, because anything lighter will very quickly be turned to crap on our roads.
do some research on 1-piece wheels vs. 2-piece and then forging methods, and add that to your shopping. you won't regret it.