If you're a gamer who likes Macs, you must run Bootcamp and install XP side by side. Games don't make it to the Mac, it's a fact. I've done a recent Bootcamp XP install (I don't own a Mac, helped out a friend) and it's extremely easy.

Even with that in mind, a Mac isn't going to upgrade a quarter as well, is going to cost more for comparable hardware, and in the end all you gain is a slightly more tolerable OS and a kitsch factor.