Also think toadly outside the mac/pc thing... there are some interesting little portable 'puters if you're mainly going to do word processing. I love my alphasmart for taking notes (especially at conferences), and then I just upload the stuff onto a real computer. I'm thinking of getting one of those industrial strength do-the-basics 'puters...
Snork... Macs give me all kinds of issues, especially the pains in the pocketbook. I am forever trying to figure out how to*tell* them what to do and they want to tell me what they are sure I want to do. It's because I'm more accustomed to PCs, but if you're thinking of making the switch... be prepared for adjustments.
F'rinstance, I can get OPen Office for free to do all kinds of word processing and everything that Microsoft Office will do on a PC - it's not so good on my Mac, and there isn't a good free word processing option.