The new world cichlids I would suggest for a 30 gallon/120 liter would be either, Convicts, Parrotts, Rams, Angels or Firemouths. There are several more but these are usually the most common. Now because its a 30 gallon you're limited to few numbers. If you want Parrotts and Convicts, thats pretty much all you can fit. I would go with 2 Convicts ( not a pair ), and 1 Parrott OR 2 parrotts and 1 convict.