I've decided that I need an external HD and that the most cost-effective way of rockin' it is going to be building it myself. The sexiest option is a 2.5" with a cheap-o enclosure from ebay. Now, if I'm correct, USB 2.0 is actually just as fast as my firewire 400 on my iBook, so I can get either a USB 2.0 or firewire enclosure, whichever is cheaper and still not lose any speed, right? Also, as far as chipsets and different ATA numbers, what should I look for? I don't think that 2.5" enclosures come with a chipset, let alone an Oxford 911, but I could be wrong. Is there any reason one would go for a 3.5"/Oxford set-up or even a 5.25" set-up? Any recomendations for good companies building the HDs or enclosures? Reviews? Experiences? N.