Why would you ever buy a Mac? Just install it on your PC! It runs just like it would on a real Mac (depends on your hardware), and 90% of todays newer hardware is perfectly supported.
You might as well use Bootcamp to install XP/Vista on there.
Hell I have Mac OS X Leopard 10.5.4 on my PC with an AMD CPU and it runs PERFECTLY.
And no, it's not illegal to have OS X on your PC, it's perfectly legal, but against Apple's EULA, but nobody reads those stupid things.