I'm thinking of buying a 15" Powerbook 1.33GHz Combo Drive, 256MB memory. I'll be using my PB mostly for graphic and web design works -- Adobe Illustrator, Photoshop, Dreamweaver etc. My worry is that with 256MB system memory and 64MB video memory, is it enough for running Illustrator and Photoshop at the same time, with both app. opening multiple files? I know that upgrading to 512MB RAM is a better option, but I'm on a tight budget, so I don't want to do so unless it's really necessary. One more question I have: Is 1.33Ghz fast enough? Thanks in advanced!