Am using both LINuX and MS Xp and 7 now its ok some new features there, we cant avoid MS also...What windows is trying to do now is what Linex has done years ago.... but theres Linux has some probs too when it come to mass usage.... XP is no doubt a good system, but Vista is built on rather modern approach. security provisions of Vista are better considering XP...bt Vista eat lots of memory...like 64 Bit, eats up RAM (2 GB Straight with no additional processes),If your business depends on IT i.e. Software development or similar, Vista installation problems can close down your business because of bugs and support issues......MS had once released an OS by name "Windows Millenium" before Xp..have never seen it anywhere except in one CyberCafe in India 😊........I think If Apple can get smarter it can beat MS in OS game in the next 5-10 years time frame but for that to happen Apple must be ready to do street fight.