Thanks for all the suggestions guys! I need to do some research on large new world cichlids before I suggest one to him, and I won't make a suggestion unless its a fish that will be comfortable for its whole life in an aquarium the size of the one he will get.
just to help jumpstart my research, can you guys suggest cichlids that can be kept in pairs or singly in these size tanks:
120
150
180
Thanks a lot guys!