Thats funny...I was thinking of doing the same thing. I'd go with 6700k if you like overclocking your cpu to higher clocks. But I'm in the same boat, since I stream I think the 6800k 6 core would be a better fit. Either one will be a nice upgrade from those [H]ot ivy bridge. (y)
I own the chroma, and can tell you it fits comfortably in my hand. Not sure about the elite. I'd do some research on it to see what the difference are.
Have your tried this not sure if it'll help, but it might keep you from having to clean install windows...https://forums.geforce.com/default/topic/550192/geforce-drivers/wagnard-tools-ddu-gmp-tdr-manipulator-new-cpu-core-analyzer-updated-04-05-2016-/
I played BF1 beta on my asus rog 4k monitor and it performed very well for a beta. Never dropped below 50 fps and it looked amazing. I'm sure gsync helped as well, but still looked amazing. Though I really didn't see a huge difference when I would change from ultra to high. Definitely a nice...