Yeah africans are great
As Frenchy has said its a good idea to go with different colours/shapes, basically just have a look around probably through this http://www.cichlid-forum.com/articles/a ... allery.php see what you like and probably post in cichlids with what you like and see if anyone has any or has seen any because some of them are hard to find..
When you've decided what you like and if they're avaliable then people can probably advise you how many of each to put in or if they're suitable for the size tank you have..