Oh nice catch Ripster. I donno if I'd be quite as interested in the SA, the DSA as sixty said would be the ones that are uniform and probably the cheapest. The DSA are the ones in the pictures too, it seems, that I and guilleguillaume went :O over.
I haven't really typed on sphericals so right now I'm mostly just commenting on how I like the look of them, but if they're cheap enough I would love to try a set out, and then maybe they won't look quite so sexy after I know how I feel typing on them.