Letterhead for company letters

Hi, we are looking for a design that looks like the attached file (which was created by ourselves). Our company (expert-shops) will use this letterhead for all its communication towards clients. We are a internet retailer that sells products in Europe and are very focused on service (hence the line: "service buy experience". The end design should look something like the design that we made but then more creative and maybe incorporating some elements of the internet, experience, service etc. We are a bit different than the rest and you can therefore be quite creative. Just make sure there is some room left for the actual letter :). We are looking for people that are very experienced in designing such a corporate identity.