Games used to be the single biggest argument against buying a mac. However, now that you can install windows on them using Boot Camp, games are easily playable. The only downside is the fact that the video cards in their consumer-level desktops can't be swapped out, so you're stuck with whatever they decide to offer. My desktop is the crazy over-priced pro model, so I can change my video card, but it came with such a beast of a card that it hasn't been an issue yet.

I would never want to use windows full time, but I'm willing to reboot into it once in a while to play a game.