I can't really comment without knowing what exactly is going in. If you have 2 of either of those cichlids you are pushing being fully stocked without the loaches.
It will be 2-4 depending on the stock...
4 would only be if I went with 4 smaller ones (Firemouths, Cons... 6 inchers basically)
2 would only be if I went with 2 of the bigger ones (pikes that get a foot and say a mayan or something).
Mostly likely it will be 3 of them... depends on what kind of mood I am in at the time..