Dell's UltraSharp series is well known for their solid performance and excellent range of connectors and the U3014 continues this tradition. The 30-inch display offers some excellent color capabilities with 100% coverage of sRGB and nearly 99% of the AdobeRGB gamuts. In addition, Dell color calibrates each display at the factory for both of these color profiles for excellent out of the box color. Dell has reduced the number of video input but it still offers DisplayPort, mini-DisplayPort, HDMI and DVI. In addition to this, it now features a four port USB 3.0 hub. The stand supports height, swivel and tilt adjustments. An optional soundbar is also available for those that want to have speakers attached to the display. Prices start around $1250.
Technically the Dell UltraSharp isn't a 30-inch display but it is close enough in size thanks to the unusually wide 29-inch panel made by LG. This gives it a super wide 2:1 aspect ratio used by many wide screen movies to give it an excellent display for media watching. It does use an unusual 2560x1080 resolution to achieve this which technically makes it lower than the larger displays. Thankfully, this comes with a reduced price of just $600. In terms of performance, the display provides a bright 300 nits picture with very wide viewing angles thanks to the IPS technology. The color is also great with 99% of the sRGB color gamut. Video connectors include DisplayPort, mini-DisplayPort, HDMI and DVI-D. Also included is a four port USB 3.0 hub.
4K Displays are relatively new and prohibitively expensive for many people but they offer the highest display resolution possible. The ASUS PQ321Q offers a 3840x2160 display resolution thanks to the new IGZO panel technology that offers higher pixel densities with better power consumption. It comes with a very bright 350cd/m^2 brightness and quick 8ms response times. Viewing angles are wide and color is good but not quite as wide as existing IPS displays. In order to use the display, you need a DisplayPort connector or run it at 30Hz over an HDMI v1.4 connector. There are a pair of two watt speakers in the display. The stand offers height, swivel and tilt adjustments. Priced around $3500.
This monitor is designed for the serious graphics professional in mind. Both of the screens above do an excellent job with color but they fall somewhat short of what the NEC PA301W-BK-SV can do but they are far more affordable. Color gamut support is very wide with 100% coverage of the AdobeRGB and full coverage of sRGB. The big difference though is the inclusion of the SpectraView color calibration tool and software to keep having the best color over time. It isn't as bright as the others topping out at 350 nits but most of the time you won't be running at full brightness anyways to prevent the colors from washing out. Connectors include two DisplayPort and two DVI-D. It does feature a built-in USB 2.0 hub as well. The best part is that the stand fully supports height, swivel, tilt and pivot adjustments. Pricing is quite high at $2400.