How about Apistogramma Dwarf Cichlids
Triple Red Cacatuoides
are species that I currently keep and aside from being wonderfully colorful they are quite interesting little cichlids.
How about Dennison Barb's
- a school of those in a 55 would be awesome!
Rummy Nose Tetra's
a nice school of 10-12?
for the upper levels?
are definitely different, I saw one on our club forum for sale recently and the guy had photos of the fish in his aquarium spitting at prey.
I also see that you haven't kept Killifish
, very colorful and neat fish.
You've kept a lot of fish with great variety and that is SUPER!, but there are lot's of great fish you still need to keep