There is a very important thing that every computer shopper should know about. I'm talking about a new operating system from Microsoft - Windows Vista. It'll be released for ordinary people earlier next year ( about February time), but many current PC buyers will be eligible to a free upgrade. Windows Vista has several versions for business and home owners. I recommend to aim not lower than Vista Home Premium Edition. It has very cool Aero desktop interface , don't miss it. To make long story short I recommended to my parents to buy a PC with Windows XP Media Center 2005 Edition operating system. Only this ensures a free upgrade to the Vista Home Premium Edition. If you buy a computer with just Windows XP Home Edition, the free upgrade is only to Vista Basic. It'll be without the Aero and other very cool things. Don't do it, or it'll cost you about $90 to get Vista Home Premium Edition.