As far as gaming monitors go, the HP Omen 27" performs incredibly well with a gorgeous display that's crisp and fluid, and it has a few nifty features as well. However, it's also a bit expensive for what it is.
Vibrant 1440 display; Impressive response time; overclocking to 165Hz; G-Sync enabled
Difficult to navigate menus; Color banding in shadows; Weird placement of buttons and ports