Hello Tordeka.
Firstly we will need to know you budget for this gaming PC. Is it 700$, 900$ or over 1000$?
For CPU I recommend brand new Kaby Lake...but again, how much are you willing to spend on it? Best pick would be and i5 for around 250$. Then again...do you want to overclock, yes or no?...
Please tell us this important informations and we will be happy to help you. I'm building a Gaming PC myself at the moment
Good day.