At Sampa I have a dual-monitor setup with two Dells 20in LCD which gives me a 3200x1200 working area, but at home I have only one monitor, also a 20-inch Dell LCD.
Once you go dual-mon is hard to work on a setup with a single monitor.
You might have saw Apple's self serving study where it says that a 30-inch monitor increases productivity over a 17-inch monitor. A lot of people might laugh at it, but I know it to be true.
Now I have to keep alt-tabbing between VS, MSDN, Outlook, IE and Firefox. Argh!