I'm not sure if to buy the 21" 2.9 GH with fusion or the 27" 2.9GH with fusion. As you know the price difference is just 300 $ and with the bigger one you can even upgrade the RAM later on.....but If i imagine the 27" on my desk, it will look very big. i tried a 27" at the store today - i had the impression that most of the time you dont even use the bigger screen. Surfing the web or writing you just use a small part of the screen. What do you think? What did you decide? And why?