Agree with ChainsawAsh on just about everything.

I use a Mac because I am accustomed to them--my dad works exclusively with them in his capacity as systems director for a publishing company. He knows all the ins and outs of their capabilities and is always up to date on their releases. After some bad experiences with PC's, he made sure we only ever had Macs at home, and I've kept to that for myself ever since.

The capabilities of Firewire alone astound me and I'd never want to be without it. Not only is it faster and more reliable than USB, functions like Target Disk Mode are immensely useful and make data transfer very easy.