The owner of the LFS should be calling me tomorrow to info me about the three young cichlids. I will post here his answer, in order to confirm with you.
Thank you for your help.
I suspect I have hybrid cichlids, their head seems to elongated to be Kenyi. Hope you can help me provide propper aquarium settings for these fellows.
Bulldog: Thanks for your quick response.
Exile: despite not being "good specimen" (kind of eugenic comment), I'm going to give my best shot in providing good care for them.
Xalow: The only reason they are with the young Oscar, is due to my mistaken purchase, until my new 145gal is cycled (work in progress), and until I figure out their setting requirements, I ordered a 72gal bow (for a school of 8 red-salmon rainbows) and a 55gal for these three fellows (if I need to switch them from one tank to another, no problem). Delivery expected within 21 days.