...is the best advice anyone's ever given regarding computers and when to buy them.
I'll admit, I hate Macs. But Charis' advice is right on: if you like your Mac, stick with it. Get a PC just for gaming, and nothing else. You get to keep your loved Mac, and improve the possibility of your gaming enjoyment (via more titles) on your new PC. Plus, it will broaden your horizons a bit. And, aren't you one to take that oppurtunity whenever it comes a-knockin'?
Roland The Gunslinger