So, I've been looking for a fairly large display I came across a good G-Sync 4K 28 inch Acer monitor. It was a little out of my price range, but my main concern is if it is worth it. I'm debating if I want a 1440p or 4K monitor, if I get a 4K I would need to 4-way SLI a GTX 980 to get full performance (according to the GeForce website 'help me choose' tool). If I choose the 1440p option, I only need to 2-way SLI a GTX 980 for full preformance. Is there actually a noticeable difference between 1440p and 4K that I should worry about?