you'll enjoy them BIGTIME!
Check out the African catfish section for various posts about these cats by me, Dinyar and loads of others.
btw there are more cats than just Syno's very suitable for your tank, not in the least because they co-evolved with those Riftlake cichlids and are used to both them and the alcaline hard waterparameters.
Check 'em out on both forum & planetcatfish (CotM, catelog, etc)
-Lophiobagrus cyclurus
-L brevispinus
-Phyllonemus typus (might be a bit too peaceful for certain Malawian Mbuna, but can be used with moderate Malawian Haps, Utaka, Yellow Labs, Peacocks etc)
-Auchenoglanis occidentalis (big tank, it's a big 'un)
have fun scrounging data
