For commercials websites be better to use the VirtueMart. It's very powerful component and absolutely FREE. Also have good support's team on their official website. Recently Joomlashine.com announce new awesome template called JSN Epic, you can check it via demo and download it without registration.
There are people that do excellent custom designs for Joomla sites. I had these two sites customized... nuxalknation.org and pchabitat.com One was a default template redesigned and another from rocket themes... redesigned... Lhlalyam
Indeed, Joomla is too pretty too easy.. but it could be a bit tangled for a huge site.. Drupal manages the code well, and is recommended for bigger sites.