Thats a nice looking tank you got there. If you do tanganyikan cichlids you could put a school of jumbo cyprichromis in there as well. Their pretty expensive, but they look awesome. Their also great at bringing other fish out. I'm not sure how hard they are to take care of, but heres a place that sells a few different species of them as well as many more tanganyikan and malawian ciclids.
http://www.reservestockcichlids.com/home.php?cat=4