For the price of a single 1070 I can get two 970, so the ratio hashrate/dollar is better with the 970. Since the power consumption is my lowest concern that may be good. Also, I have just a little spare money, just enough to buy one 970.
is it profitable now in mining some alt coins? what is price of electricity in your country?
i gigabyte gpu because the performance is much efficient than msi.
but AMD Gpu is more i preferred since i was using this model when i mine last year.