I think it's time to that you got yourself a 180gal grow out cichla tank. That would solve all your problems.
I agree with everyone else. I think it's time you get your hands on all of these species. Post them pics up here and come join the cichla group. You may find yourself getting rid of most of your other fish just so you can keep cichla. I've seen some really nice cichla and Asian aro tanks.
The Asian arowana peacock bass datnoid and ray mixed tanks are sure popular here. I'll definitely record the progression of the cichla collection when it starts.
Getting two of each sp. does it have to be male and female? The odds of that is not very high.. Unless venting and I haven't done that before myself.