Why isn't there's a multi-option? When I first read the title of the thread. I was assuming name brand computers like HP, IBM, Toshiba, etc., but this thread came up as operating systems. I have Windows XP Server Pack 3. The best operating system I have ever used so far is Windows Vista.
EDIT: MarsOperaPhantom: They do still sell XP computers. The new computers powered by Windows XP will have a sticker note: Designed for Windows XP - Windows Vista Capable, just like mine does. Who ever told you that they don't sell computers powered by Windows XP is wrong.