**Sorry this is slightly off topic**
Be warned we have found the 390's to be oddly temperamental.
*Random blue screens
*Won't WOL no matter what we do
*Had a ATI card in one and had to turn off error reporting to stop it crashing (not really the 390's fault but the same card in other models works fine)
*Sometimes will only accept a Logitech "el cheapo" mouse in a certain port, sometimes not all and sometimes only after a dell mouse has been plugged in. This occurs very randomly and sometimes affects the keyboard as well.
Other than that they are ridiculously light and have metal plates behind the CD drive blanking plates.
Good luck