@Hegis75
Don't go for XP. They got some wierd licencing going on starting from XP and Win2k SP3.
Using those two gives MS the right to practially access your machine at any time they feel like it.
Oh, and resently some nice german guys cracked the windows update thingy. It turns out that MS gets your entire registry database ever time you connect. And XP/Win2k SP3 has this "check for updates every week" set as default. Bet CIA don't have as exact info about the world as MS does. :-D