hmmmmm very delicious thread much food for thought
i would have to say that i would do a kigoma frontosa colony with 2 males and about 10 females then i would do a really nice rock formation in the center of the tank with lots of hidey holes an i would put in a good selection of gobies in addition i would add some african crabs with a nice selection of calvus i would choose to cut a foot off the height so as to make it wider and give them a better swimmin area
for filtration i would make it so there was a moderate flow variation where i had the powerheads set on a computer to change the flow direction intermediately so as to make it different for them
in about a year i will begin to plan out my personal bat cave with diagrams i have some crazy ideas but that is how i would stock a tank like that