The XG27AQM by ASUS was launched a few months ago and now it can be bought from Amazon for only $629.99 which is almost one hundred dollars cheaper than the original listing. This monitor is probably one of the best 1440p models that you can buy for competitive gaming at this time.
The ASUS ROG Strix XG27AQM offers 2560 x 1440 QHD resolution, 270z OC very fast refresh rate, 144hz standard refresh rate via HDMI, 0.5ms GtG advertised very fast response time, HDR10 support, 27-inch Fast IPS screen, 97%% DCI-P3 and 150% sRGB color gamuts, 1000:1 contrast ratio, Flicker-free, Low Blue Light, HDCP support, NVIDIA G-Sync support, Shadow Boost, HDR Mode, DisplayPort 1.4 ports with DSC support, two HDMI 2.0 ports, 3.5mm headphone jack, stand that offers complete mechanical ergonomics letting users adjust the screen in any direction possible.
The monitor's refresh rate measures 270hz only in OC mode and when using the DisplayPort 1.4 input. The monitor's Adaptive Sync is advertised as NVIDIA G-Sync compatible, but it will surely work with AMD FreeSync technology, too. If you are looking for a gaming monitor with IPS screen, very fast response time, really high refresh rate and great for 1440p gaming, then this ASUS XG27AQM monitor is probably one of the most reliable units you can buy this 2021. The monitor is currently sold on Amazon for $629.99. Note that we're talking for Amazon US.