I think what was said before is true: there my not be a "best" OS, they all do different things. I like this quote:
I prefer Mac OS for most things. Linux is good. Windows for games.
I've only got one and it's only 10 GB I need a new computer. The one I have is like five or six years old and only 300 mhz, but is still pretty good. I hope to get myself a new one soon with a bigger HD. Or I'll just get an iPod to use as an external HD. I want one of the 20 GB iPods.
if you are a gamer, you should use windows. Not enough gmaes make it to the mac. but other than that, I prefer mac by far. I love OS X. It has a great look and is stable and easy to use. There aren't as many applications availbe for the mac, but I still thinks it worth it.and they have the best looking computers