Interesting read, I will be forwarding that to some of my co-workers who like to use the expense point as a valid argument. It is funny how they all use the same arguments that are outdated or irrelevant. They never do a cost analysis they simply recite what they heard at the anti-Mac conference.
What I like about my situation is:
1) I work tech support at my uni
2) I know my stuff, I dare someone to argue with me using their bonehead PC arguments. You will lose every time.
I catch alot of flak at work because of my Mac usage. Its pretty funny though, as they know the above and it makes it hard for them to drill me much.