It appears that Leopard includes Boot Camp (http://www.apple.com/au/macosx/leopard/index.html). My wife will be buying a Mac (probably with Leopard), but needs Windows for a while (I have extra copies of XP). She might keep Windows for a long time for some games. But if she's using it for games, I doubt if she wants to shut down her Mac to play them. That would indicate that Fusion or Parallels would be worth the money. What should she be considering?