Hi I know my question is kind fo weird but I cant decide on my own. When I went to a store, I just loved the big size of the 20" iMac. But on the other hand people get used to the big size quickly and even that seems kind of small to them. I use a 15" monitor right now so maybe thats why the 20" looked so awesome to me. Upon calculation I would be paying $200 more only for the screen. Being a basic user I dont know whether I even need the large screen. I wont be doing any heavy work like Final Cut to need the large space. Can you please help me decide between the two?