have you ever tried to game on two monitors ?
it's very awkward for most games with this bezel gap in the middle. So 99.9% you will endup using only one of them for gaming.
it's either single, 3 monitors or 21:9 ultra wide monitor. the more affordable type of ultra wide monitors 29" or 35" is 2560x1080 which a GTX 1060 can handle easily.
the more expensive 34" 3440x1440p variant would require GTX 1070 or GTX 1080.