ChrisH, Remember that BootCamp will require actually booting to Windows and your Mac OS-X won't be available without rebooting (one or the other). Give VMWare Fusion a try, it runs great and you can run a fully operational Windows 7 in only 1GB RAM. It also allows you to switch between Win/OS-X just like switching between applications. I ran it on my MacBook Pro with 4GB RAM with no problems whatsoever. Not sure I'd want to use it for my weather stuff, but for a basic station it would be fine.
As far as Windows or OS-X being a better OS, there isn't an answer really. Measuring by virus counts or users certainly doesn't mean much. I have been intimately familiar Windows since 1982 and Macs for the last 5 or so years, and the fanboi levels on both sides are really annoying. I recently sold my MacBook Pro and moved back to my Quad core Dell as my daily system, but still use my MacBook Air regularly, as well as my beloved iPhone. Now that is a really nice device.