I dunno if this helps but you can search Summit Racing's LARGE selection of wheels online by wheel specs. Lug pattern, wheel height and width,
backspacing, material, etc etc etc. I use it when I feel like torturing myself with stuff I can't afford.
www.SummitRacing.comEver notice when you want to buy a set of used aluminum wheels NO ONE has a set for sale that you can use or that isn't priced out of your range?
Honestly though, I called Summit a few weeks ago and asked about weights on a 15x8 steel wheel vs a 15x8 American Racing Baja. It was less than 10lbs per wheel, I think in the 6-8lbs range. I was sort of surprised because people talk about the difference in weight like it's much more. I can see where it would add up like Shredder mentioned but the difference in weight isn't terribly much.