COST 4 me.
RX 470 - U$$ 246,00
RX 480 - U$$ 291,56
GTX 1060 - U$$ 262
GTX 1070 - U$$ 485
I ONLY buy RX 470's for the fastest ROI, and at your budget you could build a 4 card rig with those. Go with Sapphire as they are the best board partner.
agree on the RX 470 but not on Sapphire. out 50 24 cards have been leeking cooling ooil on the RX 470 4Gb Nitros