EDIT: I notice you already have a PowerMac G5. Disregard the part about buying a PowerMac. Also, how much RAM does it (the iBook) have?
If your planning to use for the internet,i would save your money and buy a 12" powerbook.
I have owned both... the 12" 1.25/1.33 powerbook makes using the net with a lot less lag.
Just hit a bid on a 1.5GHz PowerBook G4. Hopefully I'll get it![]()
It has 768MB RAM, but I have laptop RAM in my closet that will fit the machine. I have two 512MB sticks.
I'd say the 1.33 GHz iBook G4 would be the best one to use for internet. I have no idea why, but on Leopard they just seem way faster, and you have two-finger scrolling built-in. I guess you can use iScroll2, but I'm using it on my 15" PowerBook G4, and it's so jerky that you can't really use it for much. Just trying to scroll down a blog brought me two articles up, as an example. It could work for you, and I've heard from some people it works well on their laptops, so it could work for you.