When we last left our Arch Linux install we had a lovely command prompt.
This is fine for a server, but as this is a desktop, it would be nice to have a GUI. We will be installing Xfce. I started using Xfce when looking for a lighter weight GUI than KDE or Gnome. Openbox and Fluxbox are certainly lighter but require more configuration and setup than I prefer. Xfce was a nice compromise. Light enough for my needs while still remaining a full desktop environment.