There are forum plugins for Wordpress. That might give you some of the features you are looking for. I have not used them myself, but I know they exist. If you

There are forum plugins for Wordpress. That might give you some of the features you are looking for. I have not used them myself, but I know they exist. If you know CSS and PHP, you should be able to mod something to get the feature set you need. If you want something that goes up quick so you can generate content, Wordpress is the way to go.