Lunga Chung: Awesome, you basically confirmed what I was trying to figure out.

If interested in mining Etherium directly the RX570/RX580s are best since they are so cheap and run the Ethash algorithm just as good or better than the more expensive Nvidia cards. Downside to RX570/580 is that they aren't very profitable running other algorithms.

Maybe for this second rig I will go with 1070's since I am willing to spend a bit more money and don't want to put all of my eggs in one basket. Should I go for 1070 or 1070ti? Or whatever I find at a cheaper price?