Webshop similar to NikeID (incl. customization area)

We need help developing a website that is very similar to nikeid.com. We will be selling custom belts. We need the website to help the visitor to design their own belts (styles, colours, options, etc.), purchase the belts (merchant account integration), and follow the status of their order. We will provide the logo and website text. We have ideas on the creative design, but are however open to your input. Please visit [login to view URL] and make sure you see how complex the project is. We need a team with proven website development. In particular, we need a team comfortable doing interactive graphics applications via a website without slowing down performance It is also important that all content will be driven by admin control cms. We do not want any text hard coded into web files. All content must be database driven. Along these lines, item maintenance needs to be as clean as possible for the admin. Please make sure you think about both the frontend and the backend. Please let us know cost, timing, platform for development, and how you will tackle the interface for the interactive design piece. Attached a document with a brief description on the requirement for this new website. As much information as currently available has been put into this document, with respect to design and functionality. Please note that we are looking for a partner for the long term. We have several IT projects we are currently working on. So we are looking for a partner we can build a long term relationship with. Looking forward receiving your quotations. In case you have additional questions, let us know please.