Need help to choose water pump

I have one 230 gal tank with one overflow (2" hole, about 1.5" bulkhead) and 80 gal sump. This is for freshwater, I am going to have discus, altum angel and clown loach in this tank. First tank with overflow so need help.

Which water pump should I buy? flow rate?

How about RIO 20HF? Will this be good enough?

Does anyone use RIO 20HF? How good is it?

Thank you.