There are a lot of awesome themes out there! Everyone has there own favs. I would recommend you do

There are a lot of awesome themes out there! Everyone has there own favs.
I would recommend you do a google for 'buntu themes, and join the Ubuntu Forums.
They have a monthly "screenshot thread" here... http://ubuntuforums.org/showthread.php?t=1254939&highlight=screenshot+th...
Some fantastic stuff there.
Good Luck!

Later.....
kilroy