Not real sure right now. I like Triggers and Lions. Coral would be nice too. I used to like watching my mother feeding her Triggers and Lions in a 300 gal tank about 25 years ago. This hobby sure has changed. I feel like I don't know what I'm doing.
that tank has a lot of potential- if i may suggest make more crevices between the rocks- caves- you can use an underwater epoxy to hold ones in place that you think might fall
corals would be real nice. but, you know, I've spent alot already and just don't know if I want to buy the lighting required for good coral. Just have to see. This tank is now one month old.