Just wanted some advice, and want to know what others think.

Best Shopping Cart Software is AJ Shopping Cart - It is a open source php based ecommerce shopping cart software.

you can try AJ Shopping cart software which is more flexible to use and successful too.

SNIP

In my own experiences, zen-cart would be the best. It is powerful, security, flexible and fully supported. :)

Thanks,

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So Bubblegumm, any reason why you are limiting your search to opensource? Would a solution you own and can take with you be of any interest in your analysis?

You need Aj shopping cart for ecommerce.Its best of all.Try it now.

Zencart is the most ideal choice for it's excellent SEO support.

Cre Loaded is another good options. There are many good choices.

All open source solutions are easily available and only some of them are best. e.g. PHP, Java, Magento, Drupal, Joomla, WordPress, Ruby on Rails etc. I prefer Magento as it allows handling large numbers of products in one panel.