Advise on new filter

[Taylor7700]

Looking for some advise, going to be re setting up my 180 Liter tank in the next few months and am looking for some suggestions on external canisters. Tanks going to be planted and stocked with tetras, apistogramma's and corys. Was lookng at a Fluvel FX4 but am thinking the flow rate will be a little high unless i fit a spray bar on.