dunno if this helps, but i made a similar experience one generation before the macbook generation:
i bought an ibook because i thought the powerbook wouldn't make so much of a difference. i use adobe software all the time and have a g5 at my workplace so i thought i wouldn't need a fast mobile computer. in the end however i got sick of the ibook. one of the worst things compared to my friend's powerbook was the screen-size, where the powerbook is definitely superior (and the macbook pro even more so, with its high screen resolution), and of course the graphics card.
today i'd also say the macbook pro would be the better choice because the macbook only ships with a glossy screen (not useful for graphic work in my opinion) and because the macbook pro has a firewire 800 plug (useful very often when you need to copy data from office disks).