Need an advice fellow stalkers

Hi Stalkers, I would like some advice please.

My Stalker 2 is unplayable since a few days (crashes every five or ten minutes). Not a big deal, I will wait for the next patch.

I played Shadow of Chernobyl when it released, but I don't really remember it. I already spent 27 hours in it, and now it's broken, but I don't complain because it's a fucking chef-d'oeuvre. And I won't whine against a studio who works under the bombs.

Wich game of the trilogy should I buy until my Stalker 2 works fine again ?

Thanks a lot, take care.

Edit : I loved the book and the movie by the way.