I would replace the green terror with the psittacus, maybe lose a severum as well, if the tank is stocked on the heavier side like this, realize when adults they will probably require pretty large water changes, 2 a week, to keep the water clean. These fish are prone to hlle/ hole in the head when kept in less than perfect water. I would also ask what your water hardness and pH are. These cichlids will do much better in softer, lower pH water.
Thanks a lot and what about the filtration I will have a sump but how many gph for the return pump