Hi All Can someone tell me what the fastest option is (excluding SSD's) for an external Hard drive for my 2008 machine? I'm thinking about as a drive for booting from into OS X and running Applications from since I may be in a situation where I need to work away from home but on a virtually identical machine. Is there much better than a 7200 RPM external hooked up via Firewire? Would fitting a SATA card make a big difference? No idea about this stuff! Thanks in advance.