Drupal it is.

Went swimming this morning, which gave me ample time to decide what to do next. So I committed myself to Drupal and absolutely don't regret it so far.

It has a much better categorization potential than I first thought, and definable content types. It's a real, expandable CMS, with a big community, good manuals, tutorials etc. and lots of modules that can be installed. So I've spent the day with "rapid prototyping", searching the knowledge bases, installing stuff, tweaking css and all. Am hopeful to have something running in a few days.