XFCE in Xubuntu comes with the very acceptable Grey Bird theme. I wanted something that could match perfectly with Sublime Text and the XFCE Terminal. Here's what I ended up with and I'm extremely happy:

• XFCE - Mediterranean night dark theme
• Sublime text
  • Nexus Theme
  • Tomorrow nigh colour shceme
• Terminal - Dark pastel (pre-installed with XFCE terminal 0.6)