Yeah, those are cute. A girl at my LFS purchased two and waited about three months to take them home. They turned customers away the whole time and then she changed her mind!
Awesome fish, though. I wonder if they are mouthbrooders.
They are mouth brooders. Males get as large as 14"-16" in a properly sized aquarium. Considering their size, they are not too aggressive, compared to the other Malawi predator genuses (Nimbo, Tyrano, Aristo).
They will require a 6' tank.
Here's a picture of mine. Sorry for the dirty glass....