I was looking at those, but after reading a lot of reports about color shifts from left to right, and then how Dell was saying the monitor was working within specs, I passed on it.
I really wanted a 24" screen, but the reviews swayed me, and the HP 24" 2475 was a little too expensive, also having some reports of the color shifting.
I went with a 2209wa, which is also an IPS panel, and the color reproduction is tremendous. My wife asked why I bought another 22" screen when I already had one (a nice LG), so I showed her the same picture on both by extending the desktop, and she understood. The difference in color and image quality really is enormous. The only real downside is that it's 1680x1050, if that matters to you.
There are some new 24" IPS panels out from HP now, if you're not firm on Dell, though I don't know how those are.
All in all, the IPS panel makes things look stunning.
mir