I'm with David Durham. At my last job we got two monitors and I thought I could never live without it. So when I switched jobs and I only got one monitor, it took some getting used to again. However, we use Macs at my current job. Among OSX's many great features is it has Spaces. (yes I'm aware Windows has a similar feature) Since I've started using Spaces, the need for multiple monitors has virtually disappeared, as switching between spaces has taken the place of multiple monitors. Web browser and Terminal on 1, TextMate on 2, database on 3, all in fullscreen mode or close to it. It's all convenient keyboard shortcuts, so it takes basically no effort, either physically or mentally to switch. One advantage of this setup is when I am using my laptop without a monitor, I don't feel like I'm sacrificing anything. Plus you can't physically focus on two monitors at once anyway. After experience with both, and liking both, I would choose virtual desktops over multiple monitors.