Malawi Tank Setup! Newbie :) Ideas Anyone... ?

[Naughty.nursey]

Hi,
forgotten hw to work this website so if u find this post in a totally RANDOM place i apologize! lol

History:
have had fish for about a year now...
currently have a small 15gallon tank with
1 gold angel fish
1 guppie (yes its alive!) lol
2 x these striped thingys (cant memba wat they are called right now but they are orange with black stripes!)
1 x pleco.

am going to get a BIG tank... and wanted to set up a malawi style one. this is my list (have no experience wth cichlids so advice would be appreciated!)

am thinking of:

6 x pseudotropheus estherae
6 x pseudotropheus socolofi
6 x yellow labs

what do you guys think of this??? good combo??? any ideas of a better combination? tank will have plenty of rocky hiding places etc...

i want LOTS of colour in my tank
wanted pink/red fish in there but dont want to buy jewels hahaha
are all of these fish compatible??? & eat the same diet? and all have equal aggression? lol
sorry 4 the stupid questions but i literally have no idea and all research is contradictory to others.
ps tank will b 150 litres


thanku