Whatever i get from GoG *definitely* doesn't have starforce or whatever other idiocy Stalker used to have?

Nope, it doesn't. Not any.

You may want to check this though if you already have the games on disc / elsewhere before you buy (you might be able to redeem them here!):
http://www.gog.com/reclaim


Though I think the US version was always DRM free (just as a point of interest).

Thanks, I did manage to reuse the steam key for Call of Pripyat, and It appears I already had Clear Sky from who knows when. I did buy Shadow of Chernobyl to finish the series.