Hi,
If you are not really into tweaking hardware, Go for Nvidia cards.
The Rx 570/580 5 Card rig was really Tricky to get going the way i wanted it...
The 3 gtx 1060 6gb cards were really easy and Type of set an forget.
Furthermore the gtx cards, If oc ed well, need way less power.
If that is an issue for yOu?!
Im a f***ng geek since my birth, bios tweak and all that stuff is not really a problem for me.
And power consumption is not really a problem.I have to pay for it but the amount of electricity bills doesnt matter always that is proffitable in my point of view.