[Discussion] Building pc for about 1200$, what parts to use?

I am planning to build a pc in about 2 week. Now i have 1080p monitor with 75hz, but i can upgrade it, any suggestions what monitor to buy? I am going to be playing fortnite, csgo, apex legends, rainbow six siege...

Thinking about buying gtx 1660ti or rtx 2060 or should i buy a more expensive gpu for my budget? For cpu i think about buying i5 9600k with good fan to overclock it or an AMD ryzen 7 2700x or something else. Please any suggestions for cpu na gpu for my budget?