I updated my signature with my system specs (I copied, pasted, and modified yours. hehe). Our systems are very similar other than the video cards and monitors. I'm still trying to find usable settings in this game. On Epic, it's a slideshow. I could play it on one screen, but I like the additional situational awareness that the side screens provide. I'm very happy that they render those screens separately, rather than as one image. There isn't the huge stretching I see on games like Skyrim on the side monitors.
Here's a link to a screenshot. I don't want to include the screenshot here, as it's big. It looks pretty good with this setting, but like I said, it's pretty unplayable. I don't care for the water though. It looks like mercury. It's far too shiny.
Dude, you just need 2 1080Ti's....they should be out by the time the game is released officially.