Vista

An OS made by Microsoft that has more errors and malfunctions than XP, their previous OS, but can be set to be cooler-looking (although chances are that your graphics card won't be able to run MS Word with the transparency and stuff turned on). It would be better than Leopard in terms of what it can do, if it could only do those things without crashing as much as it does. Whether or not it's prettier than Leopard is debatable, but it doesn't really matter, because it's a computer program, not a piece of art. It really comes down to this: if you have a LOT patience, get Vista. If you don't want to actually do things with your computer, get Leopard. Of course, the choice is really this: get something pretty, like Vista or Leopard, or get something that works, i.e. XP.