First build advice

I currently have a i7-7700k gaming PC rig, which I was looking to repurpose and dip my toes into the realms of the Hackintosh. Would anyone be able to recommend a good/fairly cheap GPU which I can pair with this rig, and create a Hackintosh with it? I was looking at the RX570 8GB with a 28” 4k monitor. Any other advice would be hugely appreciated.

Author: @FrostHeart101