I say Clojure, because I would be hard pressed to think of a platform better than the JVM. Garbage collection, speed, deployment are all top notch in java-land

I say Clojure, because I would be hard pressed to think of a platform better than the JVM. Garbage collection, speed, deployment are all top notch in java-land. Postgres support will probably be easier w/ Clojure, because everything is writen in terms of JDBC. Postgres is also routinely integrated w/ clojure apps. Clojure supports xml parsing out of the box, and there are json abilities in clojure-contrib.