IPB and Xenforo vs MyBB

Honestly I would go straight for MyBB. They have mods for pratically everything, and if they don't have a specific one, save up some money and put it in to a developer to make it for you.

Most of the things you mentioned are already plugins. I don't know about a character mod or gallery, but there is one for Alertsand Awards(For 1.6 and 1.8). A Portal can either be the default or you can find a plugin for one.