Labs are cool, but I like the Kribs more. They're a lot less agressive for an African. You'll want a species tank, no plants, Dolomite gravel to give them the right H2O conditions and lots of stone hiding places. Slate stacked like an apartment complex works well. it gives the fish all individual "garages" to keep as their individual territory and helps keep the bickering down. Also, you need to start out with more than you want to end up with because they're REALLY territorial and will set up a pecking order that will cause the loss of some of the weaker fish. It's unfortunate, but that's just how they are. Also, If you want more than one kind, get them all at once as they don't take kindly to newbies in the neighborhood once it's established.
Tommy