I have used Windows Server 2008 for a long time and I should say it is a very fast and reliable operating system. Server 2008 has many features disabled by default, which allows it to have better memory management and run faster than Vista. You can enable a number of features if you need them, like Aero interface or Superfetch. The best site dedicated to Windows Server 2008 is this one: Convert your Windows Server 2008 to a perfect Workstation It tells and shows you step-by-step actions to enable and use Server features right. Enjoy !