we have one at work and it is about the speed of my snow 500 ibook. my ibook is a bit faster just because of a better video card and ram and so on, but they are close. since you know the speed already, then i would say yes it would probibly be worth it. I would proibibly spend 4 on it but probibly not 5.
btw, why do you think the snow ibooks are crappy? i love mine.