Just talking tech here. My Dad has a new iMac that he loves. I haven't had a virus on my widows or linux machines in years. I like windows 8.
But if you have the money, and you want one. go for a mac. But a macbook air is a lightweight (literally and operationally) machine. If all you need to do are lightweight tasks, you can get a google chromebook for $299. And it has usb ports.
With all the spying on the American public, why would anyone buy anything from google?