Company website

this is to build a website for a small consultancy company. i have the company logo artwork (quark) which needs obviously to be incorporated into the design. the design needs to be clear , clean, slick and professional. It does not necessarily have to have flash elements. It will need to have content similar to the following website [login to view URL] I need the ability to add/update the text and add pages to the navigation once the project is implemented, so it needs to be a simple structure or the tools to be used need to be identified. Please bear in mind I need this delivered quickly.