I have a pair of bangaii cardinals in my 72. they are beautiful, elegant fish. but they are pretty boring, and mostly hang close to the back corner. they are easily bullied and not too bold at all. I had them with my pair of percs, a yt damsel, and a coral beauty. I removed the damsel in hopes of bringing them out in the open more, but they're pretty shy. they are buddies with the clowns though. they will come to the glass and stare at you, but if you make any sudden movements, they'll jet back to the corner. they're faster than their normal movements indicate.
I feed my brine, mysis, and flakes. they are healthy eaters.