I can really go both sides on this matter. I work with/support both platforms on a daily basis here at work. First let me say that Macs suck in a Windows AD env. I would not reccomend it. For home use I think they would be great for a person who possibly just wants to surf the net, not worry about spyware or viri and do some video editing and such. I am recommending Macs to all retarded people because they are simply harder to screw up that Windows, which I know they will have cluttered with Viri and spyware in a week
I do prefer Windows XP however
Its much more stable on our network and rarely have any issues.