heyyoufasching :
Okay I think Im gonna take the i7 then but do you think it is worth for me to take the k version to just have the option to overclock in a few years or should i just stay with the non k version.? Sorry for my bad english btw.
Your English is fine and in fact better than a lot of Americans here LOL. Anyway as one who runs 1440p with an i5, I see little performance improvement in games when overclocking over running stock. Of course that's a different story when running productivity apps like Vegas Studio for video rendering where I notice a significant faster render time at say 4.7GHz vs. stock 3.5GHz on all four cores.
If you are only gaming, you won't need the K. However if your build is also for productivity, a K chip might be worth it for future overclocking to keep your chip up to performance equality of future few generations. Hope that helps!