Best Buy offers the Acer Predator XB271HURET 27" 144Hz LED-Backlit LCD WQHD Gaming Monitor for $599.99 with free shipping. That's the lowest price we could find by $100, although we saw it for $115 less a week ago. It features a native resolution of 2560x1440, Nvidia G-Sync technology, 144Hz refresh rate, 1,000:1 contrast ratio, four USB 3.0 ports, HDMI, and DisplayPort.