I was a MAJOR, and I mean MAJOR PC guy for a long time, I built them, fixed them and used them exclusively. I curled at owning a mac. I finally did make the switch about 4 years ago. I now wish I had converted years ago. The mac just works. I use a pc for work, but I run my business with a mac, and my home computer is a mac. Yes it's more expensive, but I love it. For those programs that are pc only, I use Parallels. It runs right along with mac osx and can be ran in several modes. Crystal is my favorite, because it looks just like a native mac program, and is seemless to go between mac osx and windows. There is nothing on a pc, that I can't do on my mac (even windows), not to mention no viruses.
Right now I run mac osx leopard and windows 7. If you do switch, get the book, by David Progue "switching to the mac, the missing manual".
Good luck.