Finally decided to give Office 2013 a whirl... it lasted about 10 minutes... The theme options are awful... if the Dark Grey option really was dark (i.e. similar to the Black of Office 2010), I'm sure I would have kept it...

It started giving me a headache and making my eyes water after about 1 minute, there's no way I could cope working with that... and there's no way I'd subject the staff & pupils here to that torture!

I know there are posts on the M$ sites about it, but thought I'd rant here too... I really hope they introduce more themes in an update soon...