Acer XB270HU

Acer XB270HU

The Acer XB270HU is a 27-inch 1440p (2560 x 1440 pixels) monitor that comes is G-Sync capable. It uses an IPS display with a 144Hz response time and 4ms refresh rate and comes with Acer's eColor technology.
ASUS ROG Swift PG27AQ

ASUS ROG Swift PG27AQ

The ASUS ROG Swift PG27AQ is a 4K monitor that supports NVIDIA's G-Sync. It has a 60Hz refresh rate, 4ms response time and comes with a bevy of gamer-centric features like crosshairs and timers.