If you've been squinting at a screen that can';t keep up with your reflexes, this Lenovo Legion Pro 27UD-10 monitor is a proper step up. The 26.5-inch 4K Ultra HD screen packs 3840 x 2160 pixels into a fairly compact frame, which works out at around 166 PPI, so text edges and distant enemies stay sharp. The PureSight QD-OLED screen lights every pixel individually and uses quantum dots to filter colour, which is how you get near-black shadows sitting right next to bright highlights. A single USB-C cable handles video, data and power for your laptop, and the stand tucks your cables away with a phone holder built into the side. Legion Space software lets you tweak brightness and response time without digging through menus.