There's definitely some subjectivity and it comes down to what you want from a language and framework. I think Haskell is the best way to learn functional prog

There's definitely some subjectivity and it comes down to what you want from a language and framework. I think Haskell is the best way to learn functional programming because it's pure, has a powerful type system and helpful community, and it's easy to use it to replace shell scripts. One of the things that really bothers me about JVM based languages is the startup time that makes it painful to use them as shell scripts, but if you're just writing a web application this might not be an issue. If you decide to go with Haskell then you need to decide what kind of framework you want. I started with Snap and it I enjoyed using it but it doesn't have the high level functionality that Rails or Django do. I'm now using Yesod and it's great. It seems very Haskelly to me and the high level functionality means I don't have to write my own authentication system and persistence layer.