Stop it with the meta-decisions - learning Arc will take up one thorough afternoon. It's worth it because you'll start seeing ways of writing code in any language that mimics features Arc has.
Clojure will give you jvm knowledge (which could help you get a job). It also forces functional programming which is becoming more important. I think everyone interested in a new lisp should help Clojure. It feels more like a viable lisp in the short term than any other.
