I'm (amongst other things) a consultant programme manager/director, and I'm often responsible for creating business intelligence teams and greenfield BI organizations. That means I'm the woman responsible for design/speccing the enterprise architecture, which includes the infrastructure, which includes the desktops. I'm also a software developer in my own right.
Business intelligence means very large data models. These are both graphical and text, and typically contain huge amounts of detail. In the past, I've always made a point of dual screens, and the biggest ones I could get my hands on. A decade ago,that meant twin 21 inch CRTs. Today, that means 30 inch 2560*1600.
Four years ago, I bought Dell WFP3007s for all my staff. Their productivity was just excellent, way above the norm. After that, there was another client, same strategy, same results. And so on. Mucho screen = considerably higher productivity.
A couple of months ago, I bought a U3011 just for me! It sits alongside a little 24 inch 1920 * 1200 (NOT 1080p), and the combination is the display on my personal workstation. Goodness, this works a treat. I tend to use the little screen for admin, with Outlook and Firefox open all the time, and the Dell for actual real work. Sometime, I have a manual open on the little screen, rather than an overlapping window on the Dell. The Dell will also tilt into portrait mode and gee, there's *all* my code :-)
If you're a hacker and cut code for a living, you /really/ need one of these. If you're a manager and you want to get more out of your staff, buy them a bunch of these. Your people will love you and your boss will think you're a genius for getting a ton more work from your guys. Much cheaper than giving them a raise, too ;-)
FYI, I drive my U3011 with a vanilla personal computer (quad core/8GB/GeForce 8600 GT) and that works just fine. It's really snappy with no discernable delays. I haven't seen any dead pixels or bad colors or stuff like that. Regarding Dell the company, I dunno . . . I think their ordering systems are dreadful, but the couple of times I've called on after-sales service, it's been absolutely fine. I think they make good kit, and I will for sure buy from them again.
BTW, I recommend the Wacom Intuos4 Large pen/tablet combination as a graphics input device. I have no artistic talent whatsoever, but the combo of the U3011 and the Intuos4 works even for me!