Just looking for some opinions on here... I am trying to decide between the 20" and 24" iMac. I used to do a lot of photo editing in college when I worked for the city and school newspapers. I did it on a laptop of all things and wished I had a lot more room. Now, however, I do occasional photo editing as part of my photography hobby. I don't watch a lot of movies on my computer, although one now and again certainly isn't out of the question. I am wondering through other's experiences, is a 20" usually sufficient for my situation? I don't need to have the biggest and best thing, however, I found the 17" to be a little small for the old iMacs. Thanks.