After the disaster which is my current Dell 2709W (27", 1920x1200), I'll never buy Dell again.
Out of the box, about four years ago, it always had major overheating problems, which manifests itself as jitter on grey-tones (old style Windows 95 UI looks like a xmas tree). Then, in the last year, a vertical purple line 2-3 pixels wide has started to appear when I turn the screen on. It goes away after about 20 minutes. So yeah, probably bad caps.
Then, there is the f*** buttons. Almost every time I want to switch between input sources, the OSD menu times out before I can get to the right source. Just as often, the confirm button does not register the click, and I have to go all over again. F*** annoying! The old models, which had a dedicated physical button for input source was much better. I notice your U2711 has the same "fancy buttons", so it's a no-go for me.
Finally, it's the card-reader and USB hub; it doesn't work, or only works sometimes. No a big deal of course, but simply useless. However, this seems to be a rather consistent problem with Dell monitors. The same thing keeps happening to many of the 24" models at work.
Overall, I'm happy I got the monitor at the time I did, however, my next will be an Eizo, price be dammed.