After a couple of months of sitting on the fence, I finally ordered my 20" iMac 2.4 with 500gb. What pushed me over the edge was the similar iMac I got for my yearbook staff in my classroom at work. 5 days of playing with that computer and I was sold! For me, the 20" is big enough. I honestly don't have enough room where I will be setting up at home for the 24" model. I appreciate was people have said about the screen quality......but alas I went with the 20". Now I'm just impatiently waiting.