I'm purchasing a new, fully-loaded iMac when they come out, but I haven't decided on the monitor size yet. I've read a few other threads discussing everyone's preference between the 21.5-inch and the 27-inch monitors, but most of the responses don't really seem to be that logical. The trending answer seems to be "because the 27-inch looks cool." I'd like to hear more analytical reasoning from those who have experience on them, especially if you work from your computer. Here's what I've come up with so far: - The 27 would obviously be better for watching movies. Although, personally I watch movies on my TV from the comfort of my couch, so this "pro" doesn't get any points with me. - The 21.5 is easier to navigate, with less mouse movement. This might seem a little finicky to some, but I spend upwards of 15 hours a day on my computer, so any sort of stress reduction on my eyes and/or hands is a plus. - Some say that the 27 is better for multitasking (i.e. opening two windows side by side). I personally never liked side-by-side on the same monitor. I'd prefer two monitors for multitasking. But maybe it's something that takes getting used to, or maybe I just need a large screen like the 27" to appreciate side by side windows, or maybe I just need to become more efficient at it? Not sure. - From my understanding, the 21.5 would be better for gaming, taking up less of the GPU resources. But I know that the fully-upgraded 27 is slightly more powerful than the fully-upgraded 21.5, so maybe this point is moot? - The 27 uses more energy. - The 27 takes up more space. In summary, if you watch movies on your computer, get the 27-inch. Otherwise, get the 21.5-inch. Agree? Disagree? Additional pros and cons to add?