Of that list, I'd recommend Haskell and Erlang. Haskell in particular is especially interesting if speed is of concern. Haskell manages to combine the concisen

Of that list, I'd recommend Haskell and Erlang. Haskell in particular is especially interesting if speed is of concern. Haskell manages to combine the conciseness and elegance of good Python code with static safety not found in other mainstream languages. Speed-wise, it ranges from OK to great, depending on how skilled you are at optimizing Haskell. The tools for optimizing Haskell code are pretty great, though.