I have dual screens as well with my MacBook Pro, but I find that I'm fine with the 27" iMac, at least at the desk. There is plenty of real estate to have two Pages documents side by side. But it's really down to personal preference and how far away you sit from the computer. On the smallish desk that I have here, the iMac feels really big... but when you're at the Apple Store or you have more than a couple feet between you and the display, it doesn't seem quite so large.