quovadis123 :
Wow,
it's easier to buy a house or a car than a monitor. Been looking for 7 weeks, I cannot take a decision. The panel lottery really scares me. I may wait for the Samsung monitors to come out. However, I know very little about AMD cards, so this is an additional worry.
I am currently gaming on Asus 144hz 1080 x 3, with two titans in SLI. The titans are old models (my dog runs faster), and I doubt they would be able to push either a 1440 or a 4k.
I don't know about Samsung products these days; phones catching fire, dryers rattling apart. LOL, you might need a fire extinguisher and/or buffering material for any monitor/display/TV they make.
In all seriousness, look here:
http://www.144hzmonitors.com/best-gaming-monitor-2016/
https://www.monitornerds.com/best-gaming-monitor-for-you-144hz-1440p-gsync-freesync-4k/
https://elitegamingcomputers.com/best-gaming-monitors/
Lots of viewing, but you'll notice certain displays ranking consistently on all three... Your 2-way Titan SLI should drive a 1440p no problem, even if it's a 144Hz one.
One way to test, is to set your current NV panel to DSR 1.78, so when in games, you'll have the option to select 2560 x 1440;
https://www.youtube.com/watch?v=isALzFmYjV8 DSR is not EXACTLY like owning a higher rez monitor... BUT, for FREE, it's a damn good option if you have a 1080p 144Hz monitor.
You can also DSR to 4K, but honestly, I don't see the net-worth of GPU "strain" vs. 1440p and higher frames and great quality already. A true 4K display@ 60Hz, is a waste of money; increased visual quality = higher GPU requirement/strain with a lower monitor frequency response. This makes no sense... 1440p/144Hz is the "sweet-spot" with settings cranked here and there as a balance for performance and visual eye-candy. Just my opinion.
EDIT: If you are rendering, vid/photo editing etc. along w/gaming THEN 4K would probably make more sense I suppose, but as I do not perform these tasks I cannot say for certain.
Hope this helps!