If you've been looking to upgrade to a higher resolution monitor, Staples has a nice deal on a 28-inch 4K model right now: The Dell S2817Q is $270 at the office supplies retailer. That's one of the lowest prices we've seen yet—$12 under the all-time low on Amazon.
The Dell S2817Q is a pretty good 4K monitor for everyday use. Though its design is fairly generic, its 3840x2160 resolution means you can cram a lot of information onto the screen at one time. It also has a fairly wide range of ports—two USB 3.0, two HDMI, one DisplayPort, and one Mini DisplayPort—so both desktop and laptop users will find it easy to connect to.