I'm on the fence between a new 12" or a 15" PB. I've decided on a laptop because I want the portability. Mostly I'm going to be working with photoshop (files ranging from 15k-250mb). I'm also thinking about an external monitor to go w/whatever i get. Is the video card on the 12" adequate for photoshop and a 17-23" monitor? Would there be noticable difference with the 15". What about the 800 Firewire port....if i want to later hook up an external drive or dig. video camera will the 400 FW be much slower? Thanks to anyone with some good advice on my digital darkroom computer set up 