Joomla vs osCommerce. Which one is best for E-Commerce?

I have been a fan of osCommerce & Joomla for years now, but I'm considering giving Joomla a shot at E-Commerce rather than just CMS, blogs & Directories.

I would love to hear from the community to see if you have made the switch to Joomla for E-Commerce and if it has been positive and is there any limitations.