34g predator tank

[reef bound]

Am turning my 34g red sea max into a predator tank. Not sure what we're wanting, or even able to have in this size tank. Am open to all suggestions. The tank is a main focus in our living room, so really want something interesting in there- maybe more than one thing in the tank, or????? Also, if we do predators, how much of the corals and cuc would need to come out, if any? Any ideas? Thanks for ideas.