To update, I put my pygmys in today. They have a lot of personality, the mellow killies are definitly more low key with all the action of the Corys at this point. I'm currently stocked at 3 Killies, 2 Otos, 6 Pygmy corys, and 5 Amaro's. Lots of plant cover and three hours of dim moon light, everyone looks happy but will definitly be keeping a close eye the next couple days. I think I'm at my limit now. I'll post a pic in a few days hopefully.
There is one other thing I'm wondering if anyone knows about.... Any thoughts on if my two Otos would be happier with a third? As it is, they don't stick together too much, although they do school up with the corys. Would adding a third have an affect on their behavior?