Over the past ten years I have used a Mac and home and a PC at work. The Mac OS is much more stable than windows, and you rarely have any virus problems.
The new Mac OS is built on a BSD Linux kernal, and they are much more secure than are Windoze.
Had Apple had the legal budget to do so, the would have persued more than 15 patent infringment lawsuits with MS, but MS would have tied them up in Court until Apple was banktrupt.
You can thank MS for a state of mediocracy of expectaion and performance in the PC word due to a lack of competition.
Macs are great machines and the Mac OS X is a great OS. I run Windoze on my Mac, so i have the best of both worlds, and I find myself less and less interested in what PC's have to offer