What cart for me?

Just started a blog for my small business. I now need to integrate a simple cart in it for informational goods- only a few options, no inventory to track. Also need to use this for invoice payment so needs ’empty’ fields.

We used a secure phpcart from our host and processed transactions ourselves via our merchant account- no paypal and not interested in it.

Installed e-commerce light but it uses paypal. Gold uses a merchant service other than our own and we don’t want to switch.

Any carts out there that might fit what I want? I’ve been reading this forum for a few nights and clicking on tons of links and I’m no closer to having a clue.