Honestly Brad, if you want light and strong and low cost, then stay with the stock alloys. Mazda did a good job with wheel weights, and it's hard to find 14's that are lighter, unless of course you go with Panasports. But then you're talking mega$$$ for those. Get your hands on some 94 and up stock alloys that came 14x6 with the thin spokes, and you'll be happy. I run 195's on 'em. I also got the chance for some Panapsorts 14x7's for super cheap so I went for it, and I run 205's on those.
Hope I helped.
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*** KimChi Racing ***
Stan Mitchem
Atlanta Region
#11 ITA Miata