What were you getting out of the Beast that you aren't with the Leopard? If the Beast was going basically the same distance, then I think something slower that was designed to fly in your range would be the answer.
If you used the Beast for slightly overstable/straight shots and the Leopard for understable, I will echo the rest and say go with a Teebird or Eagle. Maybe try the Stalker some more since you mentioned that it was controllable for you.
Start pushing those out farther and the faster stuff will begin to show their characteristics and they will start going farther than the rest. Right now, I don't think anything faster will lead to good consistent distance (maybe "instant" distance that will be hard to control and be wildly inconsistent).
If you used the Beast for slightly overstable/straight shots and the Leopard for understable, I will echo the rest and say go with a Teebird or Eagle. Maybe try the Stalker some more since you mentioned that it was controllable for you.
Start pushing those out farther and the faster stuff will begin to show their characteristics and they will start going farther than the rest. Right now, I don't think anything faster will lead to good consistent distance (maybe "instant" distance that will be hard to control and be wildly inconsistent).