The ASUS ROG Swift PG278QR is currently available on a discounted deal, as you can get one for $430 today. This monitor is a great one, as it offers all the things you need from it in order to enjoy long gaming sessions.
This PG278QR ASUS ROG Swift offers 27 inches diagonally, TN Panel with 1ms response time, 2560 x 1440p resolution, overclockable 165Hz refresh rate via DisplayPort, Nvidia G-Sync support, Ultra-Low Blue Light mode, Flicker-free, Game Plus, Game Visual, 2xUSB 3.0, HDMI 1.4, DisplayPort 1.2, smart cable management, 5-way OSD navigation joystick, hotkeys on the back for quick access to various image functions, and support for adjusting its height, swivel, pivot and tilt positions.
The design used by this model is a modern one, as it offers a custom heatsink that will easily cool the panel using a three different silent air vents. The monitor offers a maximum contrast ratio of 1000:1, and it can display 16.7M colors. The maximum brightness offered by the monitor stands at 350 nits. Note that the monitor is sold by Amazon for a lower fee, and it is being shipped with both DisplayPort and HDMI cables - only the DisplayPort cable supports 165Hz refresh rate, as the HDMI port only goes up to 60Hz.