I am seriously considering purchasing an iMac after the next update.(whenever that comes, be it a month or 5 months) My biggest concern is the fact that purchasing an imac will not allow enough storage for my current needs. I need to purchase an external HD. My problem is that I currently have to store around 300 gigs of info on my current external (pc) hard drive. PROBLEM: How do I format an external HD for both OSX and Windows? Can I partition one external HD for both operating systems, and will it let me read/write effectively? I have read that FAT is crippled for a windows option, as it caps the size of your files. Can I format the HD for NTFS, and OSX? AND Will I be able to read and write effectively to the NTFS part of the HD by using XP on the mac?