i've kept an asian aro comm for a while now and to be honest i'd like to have both, aro comm is pretty high stress to keep but i'd like to try an aro with a gar and an armatus and see what happens
(I am among the people who voted (earlier) but did not leave a comment.)
I have both, a Silver Arowana and FL Gars (and till recently Gator Gars as well).
I have voted for Aros.
However a tank with only Aros will have all the "action" only near the surface. So you need bottom-swimmers and some who swim in the middle as well. For this reason, my "community" tank has a Silver Aro, 2 FL Gars and 1 Endli.
But, if I have to choose between Aros and Gars, I choose Aros. Aros are just significantly more graceful and active. And they have a great "personality"..
I prefer gar.
Despite both are awesome aquarium pets but i prefer gar compared to arrowana due to their features shape and their art of killing ( eating the feeder)