Lenovo ThinkVision Pro2840m
The Lenovo ThinkVision Pro2840m is one of those options, starting at $799. This 28-inch monitor houses a plethora of ports and an ergonomic design that allows the display to be turned vertically.
Lenovo ThinkVision 28
Dell 28 Ultra HD Monitor (P2815Q)
This 28-inch Dell 4K monitor is the lowest priced of the bunch, starting at $699. It's a good deal, however, its low refresh rate makes it less suitable for gamers. It's expected to go on sale in January 2014.
Asus is offering its own affordable 4K monitor with the PB278Q. The 28-inch display starts at $799 and features a slim, ergonomic design with a variety of ports.