Did you figure out anything?
you lives in US and want to start mining? good luck with that. did you check the electricity cost? if your mining reward less than electricity cost you lose money :P
btw if you not started yet, wait for 1~2 months AMD will release VEGA gpu.....but if you want to mine ETH... won't matter for PoS networks (nov 2017 or may be next year early POS will add)