instead of 4k, you should consider ultra wide screen monitors. LG 34UM95, LG 34UC97, Dell U3415W, Samsung S34E790C. The first monitor is flat, but the latter three are curved. The resolution on these monitors are 3440x1440. There are 2560x1080 monitors as well. They come in 25", 29" and 34" monitors.
These don't come with freesync, though. If you're convinced that the 4k monitor you linked is the one you will get, you should consider two or more video cards.
This post was edited by NewKID on Jun 12 2015 08:55am