I did a "Mac test"; I acquired a MacBook. One of the dueling-core, "oh, my burning thighs" models. It's OK; it came with various Unix tools I like, notably including . It wasn't difficult to get bits of Darwin, X11, and BSD Ports installed so as to have even more "crunchy Unix goodness."
As of 2010, there's something funky-ish about the USB ports; I used to be able to burn DVDs on plugged-in USB DVD drives, and that has ceased to be the case, alas. I suspect overheating as the issue.
There's some interesting native MacOS software, though the writing is pretty clearly on the wall, as Apple quite evidently considers IOS apps to their "future." I rather liked Keynote, as slide production software. I was interested in OmniGraffle, though I do not do enough diagramming (and usually use instead).