When you are deciding between a curved or flat monitor, you need to know what the primary purpose of the monitor will be.
Curved monitors are built with immersion in mind. Screen curvatures are best suited for gaming and entertainment purposes, as they can provide a more immersive experience by bringing content closer, with a better field of view than traditional flat screens.
However, if you plan to use your monitor for work, and for long hours, you will likely find that a curved monitor isn't necessary. Instead, a flat monitor -- or even a dual-monitor setup -- may be more comfortable if you are staring at information for hours at a time.