Actually, a 2x4gb or dual channel has an impact in gaming scenarios. Racing games or fast paced games where maps and objects have to be loaded fast benefit from the increased bandwidth of dual channel memory config 😉
Since you just said, I checked the price of that 1060 and found that model alone to be a bit costlier. So get this https://www.amazon.com/gp/aw/d/B01I5O5AP2/ref=mp_s_a_1_35?ie=UTF8&qid=1505304757&sr=8-35&pi=AC_SX236_SY340_QL65&keywords=Gtx+1060+6gb