Let's put it this way: PC's crash all the time and Mac's don't.
Let's use the analogy of a car:
You are going to work and you need to take your car (PC). YOu get in and it starts but it doesnt go anywhere. Worse it gets you down the block and it dies on you. You are late for your job and your boss gets on your ass for being late again. It is all due to the fact that you have a piece of shiite machine to do a important job for you. Save yourself the hassle, stress, and the pissed off glances from your boss and buy a Mac. It will take you there in style, it works ALL THE TIME, and it is the simplest machine to use.