Why not get the catfish that lives like a cichlid? Hoplosternum littorale! They're out all day, they beg for food, and they do fine in peaceful or aggressive tanks for the most part. Ignore rumors about their small size, I've seen them over 8" long and mine are 5" and 6" and still young and growing. What's cooler than a pair of armor-plated beasts that swim all day? Mine make me smile every day, and few other fish do that to my face.