PowerPC :: 12" Refurbished Powerbook Vs New Macbook - Able To Use MS Word And Final Draft

I need a new laptop and I've decided to make the move from PC to Mac. I think the thing that's bothered me most about the dell laptop I've been using for the past 4 years is that it's quite heavy (I think somwhere around 8 pounds) and bulky.

I fell in love with the powerbook 12", but held off in part for financial reasons, and in part because I was hoping there would be a 12" macbook pro.

I hear great things about the macbook, but trying it out in the store, it seems to be just as big as my Dell and almost as heavy (well, at least quite a bit heavier than what I remember the 12" feeling like).

at $1199, apple is offering a refurbished powerbook which seems to offer as much if not more than the macbook

I'm a comic book writer that travels quite a lot, so here's what I'd like:

To be able to use MS Word and Final draft
To be able to use photoshop (really just to open photoshop files, not to do much to the artwork itself)
To have something very light to travel with, but still big enough to do a significant amount of work on without straining my eyes or feeling like the keyboard is cramped
and I guess possibly to play games, notably civ iv, although it seems neither the powerbook or the macbook is good for that (the powerbook at least has a dedicated videocard)

it's mostly the size thing that's causing the hangup...I think the macbook is just big enough to be a problem on planes, not fitting on the fold out tray.