Amazon is discounting Samsung's CH890 34-inch external monitor right now. The normally $700 monitor is down to $550, which is the cheapest that it's ever been.
The Samsung CH890 is an ultra-wide monitor that's superb for business professionals who stare at spreadsheets all day. It has a curved display that can swivel and tilt, as well as adjust its height, so you can get the best viewing position for yourself.
As far as connectivity, the Samsung CH890 has a a USB-C port, which enables you to connect your MacBook or USB-C laptop directly to it -- no separate dock or hub required. That USB-C connection also allows for passthrough data and power to other devices that are connection to the Samsung CH890's additional USB 3.0 ports.