i had a 190 and that damn tank leaked several times. i would go with something else!!! same as a 180 just taller. i think it being taller had something to do with it.
How about some Brycon Dentex... Mean SOB's!!! and non stop movement
A Flock of Exodons... maybe like 100pcs
As for tank, it is always best to get as big as you can... once you find this Forum, you see things you never thought of and have no choice but to upgrade to get the next fish that gets your eyes