I second the CMS route, Joomla, Drupal, Wordpress.
Single landing pages have numbered days, IMHO. A CMS will give the site a consistent look throughout, and can be stuffed with content in a very short amount of time. Users can be persuaded to add content for you. Themes and Templates are readily available and aren't really too hard to conjure up for yourself. Articles can be cued up and then posted automatically on a set date and time.
I prefer Joomla but have recently gotten back into Wordpress with ver 2.6 and the Revolution premium themes. It now gets much closer to being a true CMS instead of just a blog platform. They say SEO is better in WP than Joomla, but I don't know. Wordpress pings by nature, Joomla must be made to do it.