My advice if your asking questions like this is not to get any! It might seem like a harsh response but if your asking questions like this, your not hooked on the maintenance of the fish but the status, i hope im wrong but its not usually the case on this forum. Get a cichlid you like, because you like it not just because it can tear another fish into bits because you will always be dissapointed with it, these are animals, it might be aggressive in the lfs but when you get it home quite docile, then what? less water changes or you give it away because of boredom. I hope my response is completely out of context and you have kept fish (or more directly cichlids) for a long time and you know what your doing and you were asking this question out of fun and if you were i completely apologise. If not please research the animal your about to get and learn as much about it as you can rather than just relying on this forum and buying it because its aggressive! Best of luck!