Looking for a specific cart organized a specific way.

So far I have tried pretty much everything, OScommerce, jCart, Prestashop, and more.

I am looking to get a shopping got that is very user friendly. I want pretty much everything on two pages.

The product I am going to see is artwork, so I want a list of my items, then photo size, qty, etc.

Example:
If someone selects Item one, aJax or JavaS will kick in and say, What size print? The customer picks the size and the price changes.

For a better idea, I saw photowow.com. I am looking for a cart quite similar to that.

I would assume everything I have tried does that, and I could also assume if I gave up on them, I will give up on zen-cart. But as anyone in here ever saw a cart like that using zen?