I am really happy with my ibook, and I upgraded with an extra 512 ram. Now my girlfirend is also thinking of getting one. She is a graphic designer working a lot with the CS2 , especially the illustrator. She has a 19” TFT so the plan is to have the ibook 12” on the road and plug it to the 19” on home. Right now she owns a P4 at 2.5 with 1 gigabyte of ram. Will there be any difference on performance with the mac? Better? Worst? What do you think?