I'm always amazed at the amount of FUD people buy into. Comments like this:
"Mac owners need a PC because outside of Safari, iTunes, and Photoshop, there is little other decent software for the mac"
"I don't know why people spent top $ for an OS that can't run half the world apps"
Really, if that's what you think then you are clueless cretins.
Firstly, quantity != quality. Sure, there are loads more Windows programs, so what? I'd rather choose between a few quality apps than a ton of rubbish ones. Do you keep copies of all the bundled garbage that comes with a new Windows PC or wipe the disk and do a clean install?
Secondly, in 5 years of using OS X as both a geek (developer, unix admin) and creative type (photographer, music producer) I have yet to come across a Windows app I formerly used that didn't have a Mac equivalent, and in most cases the Mac app has been far better.