Any Mod Suggestions for the S.T.A.L.K.E.R Series?

So I got fed up with FO:NV and upon inspiration from this post I decided to try Shadow of Chernobyl and was completely blown away. However, I wound up getting one of the more ahem crappy endings (I had almost 300k Ru to my name and completely forgot about Strelok, whoops!) and am looking to replay SoC and go on through the entire series. Haters of Clear Sky be damned!

Anyways the point of my post is to see if anyone has any must-have mod suggestions for any of the games. I played SoC with STALKER Complete 2009 and had no complaints about it but would be willing to try a different mod pack for the sake of changing things up for a second playthrough. As far as the other two games, I 'm looking for mods along the same vein as Complete 2009. That is, mods that mostly leave the core mechanics alone but make the game seem more polished. And anything that will keep me from uninstalling Clear Sky in disgust would be welcome.