oh really? hopefully i have better luck because id really like to keep one of the escondidos, so what im thinking is
GT pair (may eventually be just the male)
Argentea
Escondido (hopefully they get along ok)
Robertsoni
would this be ok final stock for 5ft tank when all are grown?
in the end it's hard to say. every fish is different. the 3 carpintis I had were all shall we say evil when it came to my GT. I have no experience with Argentea or Robertsoni so I couldn't give any advice on either of them.
I think if I were in your shoes the question Id be asking myself is do I want a breeding pair of Large New Worlds or a New World community in 5 x 18 x 26. Any pairs you have in a community setting will probably reech havoc if breeding.