Angel fish?

My next aquarium in the new year. 168L or 44Gs I think. I desperately want to keep angelfish, but at the end of the day you have to do what is best for the animal. I've done research online, my local fish store have helped me out and now I want to hear you guys opinions.

CAN I have angelfish in this size, if so how many? Ideally I would like 6 koi or platinum (maybe) as too few isn't fair and too many in a small space is definitely not fair either.

My next aquarium in the new year. 168L or 44Gs I think. I desperately want to keep angelfish, but at the end of the day you have to do what is best for the animal. I've done research online, my local fish store have helped me out and now I want to hear you guys opinions.

CAN I have angelfish in this size, if so how many? Ideally I would like 6 koi or platinum (maybe) as too few isn't fair and too many in a small space is definitely not fair either.