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You can expect a full, "proper" Clojure 1.7 experience using Arcadia.

There is a lot of Clojure code out there using Java interop. That said, a lot of "proper" Clojure runs across all three major runtimes (Java/CLR/JS) without any significant changes.

(while I'm here, let me also point out http://hylang.org in case you use Python - it's a nice gateway drug, if you'll pardon the pun)

I've never used ClojureCLR personally, but its wiki on github claims to track the main Clojure project within weeks, and the last commit was 2 days ago. There seems to exist a version 1.6.0.

That said, I bet the tooling isn't so nice to use as Leiningen, although there does exist a Visual Studio somewhere.