Sapphire Nitro+ RX580 8GB currently getting ~$1 per card a day before power. If you can get a RX580 for<$200, I would say it's a good card to hedge the uncertainty in the market and POW mining with since the ROI time frame is much shorter than comparable cards. Hashrate is 31-32 MH/s @110W at the wall for BIOS modded and undervolted cards.