I have a 15" and it's an amazing machine. It's definitely plenty fast for just about anything. If speed is seriously important to you, then I guess the best you can do is wait until next year to see what happens, but if you just need it for general work, then this thing would seem more than powerful enough for you. Just ask yourself if it is more useful for you to have a great computer right now or if it is more useful for you to not have one for possibly another year just based on the hope that the G5 PowerBook is right around the corner. If you can afford to wait, then by all means, do so, but if you do need one and you aren't doing any sort of seriously demanding work on your computer, then these new 15" PowerBooks are definitely up to the task.