I do like the altolamps and you can do them in a 55G. You will buy six juveniles and end up with a pair. For the bottom you could to Synodontis lucipinnis or shellies like multifasciatus. Not sure if I would do the smaller cyps in a 55G.
For Malawi a species Chindongo saulosi tank would be nice with 3m:12f. You would get the 3 blue barred males and the females are solid orange/yellow.
For Malawi a species Chindongo saulosi tank would be nice with 3m:12f. You would get the 3 blue barred males and the females are solid orange/yellow.