Im looking to buy a 2.4ghz glassbook. I was wondering would it be cheaper to get it with the 250gb HDD then upgrade the hard drive to a 80gb SSD and put the 250gb that came with in a case and use it as an external hard drive or get the glassbook with a 128GB SSD and then just buy a 250gb external hard drive? I dont need the 128gb of space since everything is stored on my iMac so 80gb SSD would be more then enough space. I just was wondering what would be cheaper. Also where should i looks to get a SSD and what size and kind do i need?