I don't know much about rainbow cichlids- I am sure they would be ok if they do not get very big (you don't want to over croud). If you like parrot cichlids-I'm sure another can go in there. I just don't like them because thay are dyed... It's funny how we suggest fish that we like ourselves in giving other people advice in stocking their tank even though other fish that the owner of the tank likes better will work too.
Yeh I think Ill get a pair of Rainbows, two more Pim Pitus and maybe another Parrot.
My Girlfriend works in my LFS (she is fully to blame for my love of tropical fish). They just had a load of fish imported direct from Asia, And when I went in last week I saw a Green and Pink Parrot
I told my Girlfriend they are dyed , but she would'nt believe me , we even argued about it