Coming from a haskell background, I found scala + scalaz fits all my needs. Is there a reason I should still try clojure?
Probably not if you want to keep that Haskell background. I feel Lisp/Haskell have very different philosophies and you might not like Clojure's.
OTOH, stepping out of your comfort zone is always a great way to expand your views (even if you hate Clojure at the end).