Website renovation for synthetic diamond website

We are looking for a company to renovate our existing website - this would involve redoing the graphics, layout and overall look and feel to keep up with our high end product. We specialize in pink and yellow, *man-made* diamonds (real diamond, but made in laboratory). Existing website is at [login to view URL] Project needs to be done using PHP to ensure easy upkeep for headers/menus, etc. Database tie-in to track and upload new inventory would be helpful, but not required. Important points would be a)high-end, luxury look and feel b)ease of maintenance for future updates c)possible integration with mysql backend db for inventory maintenance. Please respond with examples of existing websites your company has done. Thanks!