If you are interested in typography you might find the article Safari Web Browser on Windows and Font Rendering interesting, posted at dougitdesign.com.
For many of the reasons explained in this article, it is laughable to hear some visual designer, developer, UX person, or whomever say they are an expert in typography, yet they use a box running Microsoft’s Windows. You might be an expert in the way Microsoft’s font rendering wrecks the shape of letter-forms, and how to deal with that mess, but if you had a real expertise in, and love of, typography there is no way that you could be using anything but the Mac OS X as your system of choice.