Just got a Dell SP2309W today (Fedex). This is really a nice monitor. It is a 23" with 16:9 screen ration. The native screen is 2048-1152 vice the normal 1920-1080 you find on most 23" monitors, thus you get a sharper picture with a little more screen to play with.
The monitor can be pivoted back 90 degrees that way if you get tired of sitting you can stand to do work. Or if you are showing off.
Still getting used to the screen may have to go into screen resolution and increase the font size just a bit. My old eyes would really like that. Right now it is setup on my Win 7 machine, tomorrow I am going to get an adapter for my iMac 24 so I can run two monitors on it. Should look great hooked to the Mac.
After thought: Those of you who are using dual monitors in Win 7 have you noticed the monitor icon next to the window controls (right hand corner). It is really a neat little tool. You click on it and it moves that window over to the second or back to the first monitor. You can use crtl+Win+w to move back and forth while in a window. Cool