I mean this seriously. I'm mac through and through for everything else I do but after spending 5 or 6 years pulling my hair out with frustration over not being able to have the latest graphics cards, about a year ago I built a PC for next to nothing just for the games. Excluding the graphics card it cost about £450!!! OK, I then spent £400 pounds on a GTX580 graphics card but that's what I would have had to have spent anyway (if it were possible to put one in my MAC - I know it is apparently possible now with a bit of frigging around but it's not something I want to have to do every time I want to upgrade my graphics card). I've absolutely no regrets with the decision - being out of that stress zone is so nice. I'm not gloating, I just seriously thought some of you might find it useful having this pointed out.