Newegg offers the Acer 28" 4K 2160p LED-Backlit LCD Monitor in Black, model no. XB280HK bprz, for $799.99. Coupon code "EMCWPWC56" cuts it to $749.99. With free shipping, that's $150 off and the lowest total price we could find. It features a 3840x2160 native resolution (four times that of 1080p TVs), LED backlight, G-sync, DisplayPort, and four USB 3.0 ports. Coupon ends October 23.