I recently gave up on PCs. I had another PC break at work recently (the third one in 6 years) and went to the Apple iMacs instead of another PC. Whew! What a relief. I had wanted to try it two years ago, but I was concerned that most of my computer files contained MS Word documents. Now that there is a MS Office for Macs suite (Word, PowerPoint, Excel, etc.) the transition was nothing.
I do not know that much about computers, but I can say that since I switched I have not had a problem with it all. Solid performance and easy easy easy. I set up the wireless network in about 20 minutes (three computers and a printer). Yeah, they look kind of fruity, but the things work. As soon as I can get the funds I am going to replace the home computer with an Apple product too.
I hear that Vista is just a copy of what Apple was doing ten years ago. Consider the switch.