I do like the RX series. I picked up my first GPU and it was an RX for $320. It was never used for mining and the guy was military and didnt want to pick up and move his rig each time.
AMD, especially Polaris family more tweaker-friendly. If you believe in him, just pay him and start mining with those cards. Don't waste your time. You get a low price. I can say for sure, you will not get at that price, in another place, ATM.