You've got a baller tank....so get some baller fish. Lima's are okay....but tigrinus catfish are a waaaay nicer looking cat. Some cichla and some dats will really add some color as well
There are definately tons of Cichla fans on this site. My Balas are common but they won't be that common when the day comes that I have the biggest Trio on the site.
Fantastic set up buddy.
Stock suggestion would be some polypterus such as ornates and endlis perhaps a few datnoid too and a big shoal of tinfoils and a few more large clown loaches.
Just my 2p.