I bought a 20" aluminum imac last week. I also have a MacBook. I am taking my Imac back tomorrow due to display problems. My wife suggested I get the 24". I have never had a monitor or anything larger than a 20". I am a bit nervous about the immensity of the 24" Is it too much? Do you get use to it. By this time tomorrow I'll have another 20 or 24???? Any advice would be appreciated.