Well, I decided to ditch the Vieja (I think they're kind of ugly anyway)
They aren't all ugly!
and get a raphael catfish instead of a green terror.
My Raphael Cat is one of the most boring fish I have ever owned. Sure, they look cool, but if they have any place to hide, you will NEVER see them.
I say go with the Green Terror. Sometimes you never know if a mix is going to work unless you actually try it.