The ONLY thing I'll buy from Dell are their LCD monitors. The 19" and higher models are particularly nice, having a 4-port USB hub built in, and DVI and SVGA inputs (S-Video and Composite as well on 20" and up). The stands they come with are a bit on the cheap side, but functional. They all use standard 100mm VESA screw holes, so you could just go out and get a wall mount unit if you wanted.
I love my 2001FP (20.1"), and the one thing I don't like about it (relatively low contrast ratio 400:1) has been fixed in the 2007FP model, which I'm looking to get some day soon.
In general however, there's three key things you want in an LCD monitor.
1: DVI inputs (makes a world of difference)
2: Response time of 16ms or less (if you do any kind of gaming)
3: Highest contrast ratio you can find
If your video card doesn't have DVI output abilities (a white port), it's worth the investment to get one that does. Using a DVI connection makes for a pure digital signal from video card to monitor.