Right now I have the money for the 17 inch and can have the money for the 20 inch in about a couple weeks, but the only thing that is stopping me from being 100% about the 20 inch is does the .2 Ghz make that big of a difference? I will be encoding a lot of movies on this. And is the screen resolution a big difference? Is it basically like having a pc set to 1600 by 1200? Thanks in advance.