LG’s 27GN950 monitor is one of my all-time favourites, as it’s the perfect complement to a high-end gaming PC. You get a 4K resolution for pin-sharp graphics and text, a 144Hz refresh rate and Fast IPS panel for excellent motion handling, and a 27-inch span that fits easily onto a desk or monitor arm. After debuting at an eye-watering $800, this monitor has dropped on Amazon.com to a more reasonable $543.