I recently started mining Ethereum with one GPU RX 580 Sapphire nitro 8gb, and it works good on 31 mh/s.
I am planing to buy 5 GPUs more for mining but I don't know which GPU I will buy. So I have two questions:
1. What is the best alternative when Ethereum mining ends?
2. What GPU is better than RX 580 Sapphire nitro 8gb so I can use it on Ethereum mining now and on alternatives when Ethereum mining ends?
Right now, Cryptonight (heavy/lite)/v7) algos are very profitable on AMDs if you can locate the right coins.
$LOKI has been very profitable for me since their launch May 3rd. The difficulty is starting to catch up. But others: Solace, Ombre, Haven, etc.
SRBminer offers some good hashrate for those algos