If I was starting a company - Clojure. If I was looking for employment - Python. Clojure lends itself very well to data processing and data science, but the data science ecosystem still isn't nearly as strong as Python's is.
And if you want to mix them, you can try hy (http://docs.hylang.org/en/latest/): a lisp that compiles to the Python AST, allowing you to reuse every Python module under the sun.
