It is difficult to pick perfect Drupal themes from hundreds of them. However, after giving the collection considerable time, I was successful enough to compile the best looking free Drupal 6 themes.
Durpal is a tool and people use if often but it might be not very well used by you guys but you should check out this selection and compare it with your CMS. It is not just wastage of time but Drupal is definitely worth trying out, it has a lot more customization options and chances to add different features, which even mighty WordPress cannot handle. So, enjoy the beautiful themes collection.