Need an interactive website

Need a Joomla/Drupal based website from scratch. The website should have following things: * Should be able to fetch organic traffic * SEO friendly, should have high page rank & should perform well on search engines * Keywords should be chosen wisely as the site targets particular group of audience. * Online payment option (viz, paypal, credit cards etc) should be integrated into the site * Need to have user friendly navigation * Should have professional look n feel (My preference of theme is any combination of blue, while & grey)....your ideas are welcome * There should be provision for adding/modifying the content in future if needed Just to give you a brief idea about the website, it's a user-driven site where users can search for ads & post thier own ads. I cannot post the exact details about the topic of webiste here. I will provide the details about the content once we finalize the deal. Following things are expected from potential designers: * Professional attitude * Timely updates * Completion within the stipulated date **IMP - I'll provide the domain name & hosting details. I need the site up & running within 4-5 days as it's not a complex website, the concept is fairly simple and would contain only about 4-5 web pages at the max. Payment shall be done after satisfactory completion of the website. Please feel free to reach me in case you have any queries. Thanks!