I know they don't support all the latest game but they have the recently launched app store now don't they? I have a 360 and ps3 to play games on as I've never been big into pc gaming (farmville aside) it will be mostly for photo editing, web browsing, file sharing and converting videos to different formats.
I'd suggest visiting an Apple store and having a play around with the Macs on display, although you will have to deal with pestering Apple employees.
Both operating systems have their strengths and weaknesses. OS-X is nice in some ways (awesome mail app, decent out of the box photo and video editing software) and not so good in others (poor game compatibility). It really just depends what you're after and how important the quality of the hardware is to you.