System Builder - Ryzen 5 2600X 3.6 GHz 6-Core, GeForce RTX 2070 8 GB WINDFORCE, Meshify C TG ATX Mid Tower - PCPartPicker
Here's the build, when you look at the monitors - pick whatever you feel is more suitable for you. Civilization 6 allows for ultrawide settings, so I thought it would be a better option for you if you prefer having 2 displays but in 1. If you prefer dual 27 inch monitor, get a 1440p or 1080p monitor with the other monitor I gave you.
Only pick up the rtx 2070 at price (under 470). If not possible, get a rtx 2060 under 400.
Add whatever 7200 rpm hard drive size you believe you need (if needed)
If you type alot and like the clicky feel get a cherry brown (quieter) or a better feel but loud (cherry blue) keyboard. I added the best gaming mouse you can get vs price. If you solely want a gaming driven keyboard get a cherry mx red keyboard. Coolermaster, Corsair is a good starting point for gaming keyboards. Brown cherry are best median between typing and gaming.