I ordered the MacBook Pro 2.53GHz with the 250GB HDD. I also purchased a 500GB WD HDD from Newegg to upgrade the 250GB HDD for, and I'll take the 250GB HDD and use it as an external hard drive. So, obviously I need an enclosure so I can use it as an external hard drive, right? I hear Firewire 800 is the fastest, so I'd love if it had that option was available so I could transfer data the fastest. USB would be preferred as well, just in case. They're not very hard to install onto the HDD, are they? Not looking to spend too much, in fact the least as possible would be dandy, and it'd also be nice if the case could look half decent aesthetically.