What about Scala? It's probably my favorite language: incredibly expressive, FP+OO, higher kinded-types, great tooling, flexible performance (you can adjust between elegance and java/C++-like performance very easily), and runs on the bullet-proof JVM.

For me it's the opposite. I wouldn't let go Clojure ('s standard lib and datastructures) and I don't really care about the JVM !