[LeonidasXIV]

It depends what you are looking for. If you are looking for work then Scala beats the other two hands down. Then comes F# and Haskell somewhere in the end.

If you're looking for enlightenment, pick up Haskell, maybe OCaml and skip F#.

[pjmlp]

Well, F# beats both OCaml and Haskell in industrial support and tooling, specially if we take .NET libraries into account.