this is exactely what i did around a year ago, ditched the south americans for the africans & i am totally wrapped with the choice. in the next 6 to 12 months you will have ups & downs finding the right mix of fish. they will get big enough (providing you purchase juvies) in 6 months to breed, it will be very enjoyable for you. as for stocking, see my sig for my stocking of a 200L tank, i've had no problems with that many & you could add a few more. I do have 2100LPH filtartion in my 200L though.