The 39-inch Asus ROG Swift ultrawide OLED gaming monitor has a 240 Hz refresh rate, Nvidia G-Sync support, and a claimed brightness of 1,300 nits. Despite being marketed as a gaming monitor, its features and reasonable resolution make it a great option for basically anything, including colour-critical work. Thanks to an Amazon sale, the Asus ROG Swift OLED PG39WCDM is $500 off.