This! Go GTX 1060. It's just the better card. Make sure you get the 6gb version of the 1060, which should be $240-280 depending on which brand stamps their label on it and if they overclock it for you. I just upgraded to 1060 myself and couldn't be happier. I'm sure RX 480 isn't a bad choice. Both are overkill for FFXIV.
I got this one for ~$260. It's slightly overclocked. I don't know if it's worth it or not. If you know how to do that stuff, you can probably do it yourself and save $20.
https://www.newegg.com/Product/Produ...82E16814487261
The base version is this ~$240
https://www.newegg.com/Product/Produ...82E16814487260
