what to do?

I have a 40 gallon long with a Florida Gar that will soon go into my 180 gallon. I want to stock the 40g long but, keep changing my mind. option 1: 4 Silver Dollars 4 Horse Head Loaches 6 Dwarf Puffers Option 2: 2 fancy Goldfish Option 3: Crayfish option 4: something completely different