@Pepper, Hmm, your choice, but leadership wise, I think Barghash would be the better option, so long as you breathe down his neck and make it clear the Zanzibar is an Austrian protectorate and he has to make do without slavery. He actually developed the Zanzibar some, meaning you'll be getting more from them as time passes, and kept things under control (unlike Khalifah who caused revolts and barely ruled two years) meaning you won't have to be sending superior Europeans to take care of the problems caused by those inferior creatures in the Zanzibar ;)