The stereotypical "african cichlid" tank has a big pile of rocks and mouthbrooding cichlids from Lake Malawi (pH 7.5-8.5). But there are lots of others fish from Lake Tanginika (pH 8.5-9), Lake Victoria, assorted crater lakes and rivers (Jewels and Kribs) (pH 7-7.5). You need to be more specific. Whats your waters hardness and pH (you can easily buffer up, but down is harder)? what size tank do you have room for? Check out
http://cichlidae.com/ and
http://www.cichlid.org/. Please post where you are located as that affects where to buy. ACA's trading post is good for hard to find cichlids.