Mac vs. PC

Mye portable difference engine be afflicted with aires and maladies of a moste nefarious sorte so that I fear to touch its keyboard with my sainted flesh. I do observe that its internal aire circulation device does stray now and again from the path of righteousness and that a stern tap is required to restore its gaze in the direction of the Almighty and cause the aire to flow freely once more. And it is similarly afflicted with the twin Curses of Sloweness and Insufficient RAM so that even the simplest piece of godly software does challenge it to its limit, causing internal grinding sounds that surely indicate the unholy presence of the Adversary's daemons. Yea, verily I do need a new one.

So, the question is, what to buy next? Mac or PC? The PC I'd like is probably going to run me about $1000. A similarly-equipped Mac would cost twice that much at least. No brainer, right?