Up to you then, if i were you i would get atleast a physical Copy of SHoC just because it has the best mods and honestly, best STALKER. You dont need CS, Complete works with Steam version doesnt it? And the only worth mods for CS are Complete and FactionWars. CoP well, Complete continues to work with Steam version of CoP, and the other mods available for CoP honestly, are inferior to Complete imo. All that, photo-realistic stuff, mods for a few guys with NASA Computers, hate them bastards.
The only mod that may come to CoP and fight for 1st Place with Complete will be Supermodpack 2.6 or 3.0, the main dev said they'll be moving to CoP once they finish in SHoC. Kinda weird because they've been making 2.5 for a year or something, trying to reach perfection wich is impossible in a game, sad, looks like it is a great mod but why? WHY PERFECTION?!
WHY MEGAREALISTIC GRAPHICS, if you're gonna ignore them, im not going to sit 2hrs watching how realistic that texture is, how accurate these shadows are, how big is the sun, i just wanna run the game on 50fps, no lag at all, no freezing, walk around look for loot, hunt a bloodsucker or two, get the tentacles, go to Yantar, sell the loot to the Trader up there and use to money to buy ammo for a SVD, go back kill more stuff, get the loot, sell and perhaps buy a MG3 or something.
Jesus..
Excellent graphics in this game work only once, first time you jump into the game you see how awesome they are, how realistic or something. Second time you might remember, third time you dont give a shit and start complaning about how laggy it is.