Option A) I would get a Marbled Sail-fin catfish, a school of Pbass, a couple of Asian Aros, a Tigrinus, a Fire Eel, some large Dats, Maybe a Polypterus endlicheri congicus, definitely a ray.
Option B) I would get 10 Caribe, 5 Ternetzi, 5 Piraya, 15 RBPs, 30-40 Exodons, and 10 Trahira with plenty of Driftwood for them to hide out in. This Tank setup would be sweet.
If you can drop 22k on the tank, you better get something cooler than just a school of bala sharks and clown loaches.
You need to
Koi would be a huuuuuuuuuuuuuuge waste