We have been using shopify for about 5 months now and I'm finding too many limitations to continue using it. [url removed, login to view] We would need help getting the same format into Magento unless you have a better recommendation for us. The limitations of shopify include no sub-categories, complicated option and stock management, limited number of product options per page, limited number of option combinations per product, no way of showing whether an option is in stock and no way of listing more than one product on a single product page, if for instance you would want to have the customer build a custom products consisting of other products. There are some others but those are the major drawbacks we would need addressed with a new cart. We would be able to help with any manual type busy work for instance transferring stock, products, images customers etc. if these processes were not easily automated. The price set for the project is just a guess, you would know better than I how much time this might take. Let me know if you're interested.