OpenCart? CS Cart? Or?

 

In need of an e-cart solution.
Currently have Zencart and OpenCart running on test systems.

(Currently running in a testbed of IIS and Apache servers.)

OpenCart seems to be the best way to go from what I've seen of the two.

Now a colleague is recommending I go with CS Cart for the project.

I don't think I need to pay a $350 licensing fee and go with CS Cart. Their website didn't seem to show me anything I'm not already getting with OpenCart.

At the same time, I am very disappointed with OpenCart's web administration.

If any one has any experience with web e-commerce cart solutions, I would love to hear about your experiences.