Some interesting points but I'll play devil's advocate here because my experiences are somewhat different.
As far as atf doing better in small tanks I find that difficult to believe. They are tremendously quick fish and you want more room as opposed to less when they decide to get up and go. The people I've spoke to that have issues with them hitting the glass have kept them in smaller tanks.
I don't feed live and have experienced good growth (vatf, gatf, dorado). Feed a quality food, decent variety and an appropriate amount and they flourish.
My experience with gatf is very limited but I obtained a 10" gatf who then put on 2" in one month. I decided to sell him and go with a smaller species so I could keep him long term.
I think if you are set on these 4 choices I would go with the wolf. It may grow quickly but will probably do better than the open water predators. Good luck.
