I hear you - but when I used to service Macs I found that they had as many problems in different ways - for a techie the problem is that they don't let you mess with anything - at least with other systems you can timker. But you're quite right, Macs work more often than not, but they have less control over the hardware these days (they used to design everything). I would have changed myself, but when they say that some types of software work seamlessly across platforms, I can never quite believe them - and Microsft are the worst. If you've ever wondered why you have to reboot a Windoze machine in mid-afternoon it's because Word, etc do not hand the memory back after you've closed them down and the total available gets less and less over the day. Go figure.
Dual booting means have two operating systems on the same hard drive and you make a choice when the machine starts. In my case I have Windows loaded twice - an old trick I learned with NT.