Well, I like the cichlid/community myself when it comes to new world cichlids, so this was one of my favourate setups in a tank this size:
First the monogomous cichlid couple to own the tank. I love my Nicaraguensis, very charming and unaggressive. Lots of well mannered varieties to choose from though.
Then the open water shoaling fish. I went with congo tetra's, but I rainbow fish would be really nice, if expensive. No lack of fish to fill in for this either. I prefer a large shoal of one type, but a couple of smaller shoals would be nice too.
Every tank needs a bottom dwellers as well. I chose a schoal of Synodontis Multipunctatus because they're a nice size but don't get overly large for a tank like this - and they're really cool.
Then of course a pleco to keep algae down. I like algae growing on the rocks so I chose the Royal pleco - nice fish and it primarily sticks to eating algae off the wood.