Thinking about a small shoal of Carnegiella strigata,Sounds like a great set up in the making. I can imagine a large school of the pristella would look very nice.
I believe nannostomus nannostomus are quite wide spread in Suriname.
Apistogramma stiendachneri is also native.
I think you've got some great species to choose from.
I'm sure the tank will look great and I look forward to seeing it.
Good time of year to be setting up a new tank. Loads of free decor falling off the trees.