Sab_Fan;4282154; said:a lot of these suggestions - - Red Texas, Jaguar, Green Terror - - would outgrow a 55G eventually . . .
you might want to consider something a bit smaller, like a Blue Acara or an EBJD
EBJD can get just as large as a regular Jack, which will also outgrow a 55 gallon.
BUT, I am sure by the time it outgrows it, they can get a larger tank.