Yep, sounds like you’ve definitely got the right idea!
The popular CMS in these parts tends to be Joomla. It’s feature rich, has a lot of plugins, and probably most helpful of all, it’s available as a One-Click Install. As an added bonus, because it’s so popular around here, there’s a lot of people on these forums that really know what they’re doing with it and could probably help out if you ran into trouble.
That said, I don’t use Joomla. Most of the websites I work on are either blogs (for which Wordpress is my favored choice) or are simple, static things which sound a lot like you described. For sites like that, I tend to feel as though Joomla, Drupal, Mamba – the “big” CMS packages – are somewhat akin to using a gasoline powered swiss army knife with superchargers when a pair of scissors will do. That’s led me to gravitate toward CMS Made Simple which I’ve manually installed in a few places and is pretty easy to get up and running.
[[edit: Dear god, when I started writing this post, nobody had yet answered the thread. o_o]]