The problem with judging things on quality and cust serv experience is that for most users it's a totally subjective experience. I have had exactly the same situation with all the computer equipment I own, mac or pc, but then I'm pretty well educated about what I am buying so I know what I can expect from it. Just because your experience has been fine doesn't mean that the experience of others has been.
Most school equipment blows, mainly because there is insufficient support and funding, not because of the machines themselves per se. Anyway, it has been shown countless times that TCO of apple products is far lower than that of other PC manufacturers. this is purely driven by having the hardware and software designed in tandem, they only have to deal with so many combinations of technology.
I would also state that software designed for the mac tends to run on a lot more of it's various OS platforms than the equivalent situation on the PC. Though there is a lot less of it around. However most of the main productivity tools are available on both platforms, Office, Photoshop etc. Most of the PC software available duplicates waht is available in other pc software, not the strongest of argurments as you do get more choice, it's just in my experience the software is generally of lower quality.
the biggest strength for apple comes from the fact that it is not microsoft, i'm not saying apple is perfect by any stretch of the imagination, and I'm not saying that all of microsoft's software is bad because it obviously isn't. However, gates has an amazing ability to be very bad at PR, and seems to be totally locking into a business model he has exploited from the first, that as long as we have gained the massive market shareI no loneger need to concern myself with the needs of the user, take IE for example.
At the end of the day you pays your money and your make your choice. For me, apple products annoy me far less than microsoft ones.