If you've built an insanely powerful PC, you need something to display that power. When standard HD isn't enough - and should your rig be able to handle it - you've go the option of 4K or above resolutions, up to 144 frames-per-second displays, super-widescreens, and multi-monitor setups. Even with 'standard' 1080p/full HD monitors, there's a lot of options available: Do you go for an IPS screen? What's the best size? How important is the maximum number of FPS a monitor can display to you? Again, it all comes down to personal choice and budget. Standard HD monitors are good enough for gaming - but pick a recommended one - if however, you want your PC to be the envy of your console-owning friends, then get one that can be classified as a serious gaming monitor.
Lover of all things PC. A fan of inserting indelible ink into the dermis layer of the skin. Remembers when 'geek' was an insult. Still passionately believes Vampire: The Masquerade - Bloodlines was the greatest game ever made.