WOuld love to see pics of your screen setup.
How do you deal with the bezel between monitors ?
When I tried it at 5760x1080 the two things I was concerned about were bezels and fisheye and both weren't an issue. You have to train yourself to not look directly at the two side monitors and treat them as part of your peripheral vision.
It's not easy and I still found myself looking directly at them from time to time. That's when you see the fisheye effect more of course.