playingwithplato :
At $290, the Rx 580 with 8GB of GDDR5 is the best sub $300 card. Without question. ...
That's not even in the recommendations...
It's the 4GB version they recommend.
I'm also not totally convinced the RX 580 is the "best" if you take power usage into account.
Still, I have a hard time finding any review of 4GB RX 580s with the latest games and I'm not convinced it will typically beat a 6GB GTX 1060, with which they share pricing (at least here in Sweden).
(Available) 8GB RX 580 are more in pricing with upper end GTX 1060.