Buying an Apple machine can be compared to buying a Mercedes or other type of high end automobile. I never hear people say buyers of luxury cars are crazy because they could have bought a car that will get them to their destination just as quickly for half the price. I spend *much* more time using my computer than I do driving my car, and I'm willing to pay extra for reliability and quality. The extra money Apple hardware costs is also offset by the productivity gains I get from using OS X. Apple hardware also lasts much longer than comparable PC hardware, when I used PCs I bought a new machine or drastically upgraded at least every year to 18 months or so, with Apple hardware I'm generally happy with my machine for the entire 3 years my AppleCare warranty lasts.
Why is it that even people in IT are so cost conscious when it comes to their hardware? I spend ten hours a day, at least five days a week, working on my computer. Spending a few hundred dollars extraa year that makes all of that time more productive and more enjoyable is easily money well spent. Money is replaceable, my time is *not*.