As for content management systems, there's plenty. Your right. I think the phpnuke and post nuke stuff was pretty "rigid" as far as design and use goes. I know a friend of mine has been looking at the Mambo server package.
http://www.mamboserver.com
I haven't used it, but I hear it's pretty decent. I'm sure other people will suggest their favorites.
Just remember... the best one is the one that works for you.