CMS based site

I need a Joomla or Wordpress based CMS site built for a local emergency services group. I will need design and buildout of up to 10 navigation links. All content will be provided. Couple of extras that are needed: 1. Monthly calendar (something similar to Google Calendar) where the admin can add new events to particular dates. 2. Emergency Box - A module on the homepage that can be turned on/off and updated for when there is some sort of emergency in the area. 3. Members area with multiple levels of membership. When loggin in the users will see different content/articles based on their level of membership.