Go with the 1080 then, you answered your question. Also, you never know what games you might play in the future/ how supported sli will be. Yes the 1070 is sli capable. Also I could care less regarding the future proof situation but since I don't know you, and most people seem to care, I mentioned it. For me, Ill just sell my setup, and spend about 1-200$ more on a better/current build when the time comes.