As you don't seem to be here, and you have those three options - when was the 40Gb ever available in North America? If it is NA, off memory, the 60Gb is the original real deal, it has a whole PS2 inside, and is thus almost 100% compatible. The NA 80Gb = Europe 60Gb, it has the PS2 graphics chip, with the processor emulated. The 40Gb is the European model without any PS2 backwards support and has no card reader and two less USB ports. SACD has also been removed. It does however have a 65nm Cell, which means less power used, less heat, less cooling required, and less fan noise.