Well, I'd have to disagree. My
Cacatuoides are not aggressive at all, not even when they had a batch of eggs and the juvies kept coming around the cave. The female would just chase them off, without being overly aggressive, and go right back to the eggs.
I personally like the look of
Borelli very much, but could not find any for the deal I got my
Cacatuoides(Adult pair and juvi 1m/3f combo for $25
) so I went with them.