In a very few time, you won't be able to buy a new computer with WinXP, Vista will be given with it.
And there are no downgrade possible, my father bought a laptop with Vista, he can't downgrade as the material has no driver for XP !
IMHO, Vista is not as easy as XP, take as an example the network part, it's impossible to configure it ! You can't even see your IP easily !!

My music, webdev, photos, videos :
www.nicolaskern.fr
Robert Dugenou
Attended :
Teo&Tea showcase in Cannes [France] - 20/05/2007
Théâtre Marigny, Paris [France] - 15/12/2007
<2010> Marseille [France] - 20/03/2010
Monaco - 01/07/2011
Arènes de Nîmes – 14/07/2016