Just a couple of comments:
1. With all those crepuscular catfish you may want to use a small wattage red light to observe them in otherwise total darkness when they are active. I've done this on a tank of 20 Tatia perugiae and they are seen swarming the tank for food.
2. To synoguy, If spotted raphaels are "shyer" than striped then unless you use the red light they must be more fun to watch than polar bears in a blizzard.
3. To ginosanti, I agree with you about the banjos not be able to compete with the raphaels and other cats but banjos are so layed back you can pick them up and move them around to the food as if they were little vacuum cleaners and they take it in stride and just suck up whatever food you put their noses in. It's actually fun to do.
I like all these nocturnal cats. You might as well add some Microglanis bumblebee cats for color

. The Oil Cats, Tatia perugiae are also another cat to consider because they feed at the surface and are also very attractive.
With the red lighting it would actually be a busy tank at night.
Larry
Avid Trout fly fisherman. ·´¯`·...¸><)))º>