I am looking for a recommendation, implementation, testing, and going live with a shopping cart for an online bookstore selling ebooks and other digital content. It should be unique (no templates), feature rich, easy to use or learn, powerful and easy to navigate for high conversion rates. I was set on Zen Cart, but it appears that people can not customize it.
Please make a recommendation and proposal and we can go forward with the right product, design and execution of our vision and needs.
Experienced programmers only please. I don't want to waste any more time.