Anyway, the idea of a 27" has crossed my mind, but I had thought, and have read, that sitting in front of such a large screen can be overkill. And since I wanted fusion drive, it pushed the price to $2K, so I settled my mind around the 21". Based on everyone's comments, I'll reconsider.
Just thought I'd chime in on this. I've been using a 21" for three years, and wanted to go for a new 2012 21". But when the specs came out I knew I had to go for the 27", even though I felt it would be waay to big for my desk. Now, I can't believe I sat behind that tiny 21" screen for three years. Everything is the same size - there's just more of it!