Newegg is currently selling a 27-inch, matte Dell IPS screen for $550. The monitor in question sports a matte panel running at 2560 x 1440 resolution. This is an excellent deal.
There are similar Monoprice monitors available for about $100 less, and you could conceivably save even more if you order a Korean panel off eBay. But there are still a lot of reasons to pick Dell's U2713HM over sketchier options. First, it comes with a much stronger warranty—so you're less likely to be stuck with a dead pixel or five. Second, this panel comes with vastly superior ports to off-brand monitors: in addition to a built-in USB 3.0 hub, it has HDMI, DisplayPort, and DVI inputs. It's the Wirecutter's favorite 27" monitor, and it's at a lower price now than on Black Friday. At $550 after the code AFNJ0968, it's a great day to pick one up. [Newegg]