personally i would go for tanganyikans as most malawi's are all the same in personallity and stay in the same place in the tank, what i would do is get tanganyikans as they are pretty cheap if u get from a good retailer, hiow big is the tank, some nice fish that you mite want to research are:
altolamprologus calvus and compressiceps,
enatiopus melanogenys,
eretmodus cyanosticus,
cyathopharynx furcifer,
frontosa,
lamprologuses,
cyprichromis and
tropheus.
im buying from a wholesaler and hopefully getting:
cyathopharynx furcifer,
eretmodus cyanosticus,
enatiopus melagenys
tropheus duboisi,
tropheus moorii moliro,
altolamprologus calvus,
frontosa mpimbwi blue,
cyprichromis leptosoma(blue tailed type),
and synodontus petricola
im buying these to start a breeding project but if once i have got the breeding groups i will probably be able to send any fish that i don't need for breeding to u via courier.
i will probably be buying these in about 1 -1.5 months because i need to set up a 400 gal centralised system to hold them in.
thanks matt