Do I need a Wordpress Blog or CMS?
More and more people are using WordPress to generate the content on their site. All kinds of sites, from video podcasts to consumer reporting sites use WordPress because it makes it easy for you to add your own content without learning any HTML.
WordPress is the industry standard for blogging software, it's free to install and easy to customize.
WordPress would be a good solution for you if you want to publish content on a daily or weekly basis, but would probably not be a good solution if you just wanted a website with five to ten pages. Even if these pages were going to change a lot, you'd pay less and get a more professional result by making a "flat HTML" site (meaning no content management).
To understand better how blogging software can work for your website you should see what others are doing with it.
Here's an article article that talks more about what people are doing with wordpress
