I just got an iMac G5 (17", ALS). Probably need to clean dust/replace thermal paste/get new fans, but that's well documented. What would be the least hassle new hard drive upgrade though? I'm going to run both Leopard and Tiger+Classic. From the forums I see I should get a max 2 Tb hard drive, but which? Leopard should be just peachy with 2Tb, will Tiger give me any problems? Also, will there be any trouble with 4k sector hard drives?