What games do you mainly play? Since your display is 1440p / 144 or 165 HZ, the biggest determinant is if these games have good SLI scaling or even support SLI at all. If not, then I'd suggest waiting until later in the year for the 1080 Ti to be released, which is what I plan on doing. Please don't forget to name the games, which I presume you play on ultra settings.