Ghost, I would check again. As far as I can learn from Apple's website you can use standard IBM harddrives for your mac. As long as the machine is fairly new and doesn't use soem sort of completely obsolete format. Any Ultra DMA/ATA 33 or 66 harddrive should work just fine. Which means that you can go purchase the 99 dollar harddrive and have plenty of space. Just to be on the same side, email Apple's Support and ask them what kind of harddrives you can use in your rig. That should clear up any misunderstandings. Regards Ronin