Okay, so some things to note:
Usually the 7600k is for overclocking, and in order to overclock you need to get z series board, in your case, a z270. The 7600k does not have a CPU cooler, only non k series CPUs do.
Since you are a beginner however you dont really need to overclock, so getting an i5 7500 non k with a b250 motherboard would make more sense, you wont be able to overclock but you will save at least $100. However, overclocking CPUs dont really have that much of an advantage to begin with in terms of gaming performance.
Now with the extra $100 you can add that towards your GPU, You always want to spend a lot in your GPU as much as you can, because the GPU is usually the most frequently upgraded part of your...