Vega.
Great choice the Leleupi.
Here's some info for you.
Habitat : Found in close association with the bottom over rocky shores to a depth of 70m (230ft). Relatively uncommon in waters less than 40m (130ft) deep.
Length : Males up to 10cm (4in);
Females up to 8cm (3.2in).
Sexing : Females are smaller than males, with slightly shorter vertical fins and ventrals.
Compatibility : Extremely agressive towards it's own species. Do not keep more than a single pair in a tank less than 150cm (60in) long. Will pray on tank mates the size of a male guppy. Sexually inactive individuals are otherwise good neighbours in a Tanganyikan community tank. Parental fish behave the same as L. Brichardi.
pairs breed readily if handled in the manner of monogamous cichlids. In a large tank, a single male will usually spawn with all the available females, but generally involves himself in caring only for the last brood of fry he has sired. Spawns can number up to 200 greenish white, ovoid eggs. Unlike L. Brichardi, adult fish do not tolerate the presence of older fry in there territory with the onset of another bout of reproductive activity, so be sure to seperate parents and offspring six to eight weeks after spawning. the young grow slowly and uneven, so sort them by size to prevent sibling cannibalism. Lamprologus leleupi reaches maturity at 18 months and at a size of about 6.5cm (2.5in).
You are probably finding that you didn't realise how aggressive they are, but nearly all Tanganyikans are aggressive. I have successfully bred this fish and giving them the right conditions they will do it quite easily.