John, I think it could be cool... For instance:

An SPS ONLY tank. Maybe a tang or 2 to keep things clean.

A fuge with caulerpa, maybe seahorses

An anemone and clownfish only tank. Just PACKED with RBTAs. I saw one of these at the Denver zoo.

A goby / anthia tank. Jumpers only!

A FO tank with "normal" but not reef-friendly fish.

And a predator FO tank at the end of the sequence, right before the sump/skimmer and fuge.