A pair would be a bad idea for the most part. They are aggressive towards each other and a group is needed to spread out the aggression.
Im really pleased with the info you guys supplied the op. Searching this site isnt that easy anymore and its great that experienced ppl are here to help. Thats what MFK is about. Not flexing your fish knowledge or collection.
NGTs don't get as large either, I've never seen one larger than 12" in recent memory though a slightly larger one wouldn't surprise me.are american tigers hard to get hands on? and whats the prices like?
A stable dat is a happy dat.
ATs are the cheapest and pretty easy to find, being in general the least desirable kind. Also keep in mind this is a brackish fish (regardless of what some people say) . Price vary based on your location.
For someone new to dats ITs are the best choice IMO.