If you’re interested in paying for a theme there’s an additional option for Moodle 2.5+ on the block from Ararazu (the designer that brought us Genesis). The theme is called Saga and looks pretty collegiate. To be honest it really reminds me of the Uversity (formerly Inigral) site (http://www.uversity.com/). While the theme is not responsive, it does look polished and provides administrators with lots of customization options without having to dive into the code.
Check out the full theme here: http://18.104.22.168/themeforest/saga/