Thanks everyone.
xdoomsongx - I love discus and will probably convert the setup to a discus tank someday.
jmontee - I've had peacocks before and they're pretty unusual fish. They only lived about 4 or 5 months though. Maybe I should try again. I'm worried that I'd never see them though.
Jan - Do the butterflies have a tendency to jump? I do need a little activity in the upper layers, but most fish that live there often try to go flying. The back of the tank has a pretty large opening. I absolutely love angels, but they've always intimidated congos in my tanks. Someday I might try altums in the tank though.
TexGal - Red congos? That might be interesting assuming they could be found.
ed seeley - Nanochromis transvestitus is one I've never seen or heard of. West African chiclids are absolutely on the list. I really admired the recent article in TFH about some of the pelvicachromis species:
Where can you find W. African chiclids? Anyone know?
Aaron - I love rainbows and initially tried to find a school of praecox for the tank. I got 8 and all of them promptly died in quarantine. They're actually almost impossible to find around here. I also worry that they'd not find the soft water to their liking. Anyone know where to get these guys?