So as a update, I wasn't able to solve the issue or test the display port as I didn't have an adapter, but DP should work as mentioned above.
I did get and test the UN40MU6290 and I prefer it much more over the KD43X720E. Mainly because it has no issues with my GTX 970, such as the flickering...
So I just picked up a Sony KD43X720E from Costco to use as a monitor and everything looks great, except in certain warm grays, there are flickering green pixels arranged in a grid like pattern. The grid is consistent and across the whole display and always the same pixels.
It's hard to capture...