Hi MrHawk1,
Windows PCs are specifically designed to run Microsoft Windows operating systems and although some computer techies have managed to 'hack' Windows PCs and install other operating systems such as Mac OS X (Leopard, Snow Leopard or Lion) and Linux, it definitely is not recomended.
On the other hand most new Intel Macs have the ability to run both Mac OS X and Windows OS.
They have a built in app called 'Boot Camp Assistant' that will configure the Mac to be able to install Windows and then you can boot from either OS.
You're right Macs are very expensive but they are beautiful machines, very well built and very reliable and of course very easy to use. I've been using them for over 25 years!
You can buy a Mac Book Pro for as little as £990.00 inc VAT
Saying that the Sony Vario range are probably the best Windows computers you can buy!
If I couldn't afford to buy a Mac then I'd buy a Vario.