I don't have a lot of advice about LISP proper, but Scheme ... ah, Scheme is near and dear to my heart. But which one? Look for a standard one that is current

I don't have a lot of advice about LISP proper, but Scheme ... ah, Scheme is near and dear to my heart. But which one? Look for a standard one that is current. The usual suspects are Chicken, Guile, Gambit, Racket, Chez (Petite Chez) (am I missing any?). I prefer Chicken or Petite Chez because I'm currently going through "The Reasoned Schemer" and those two seem to work best with the code from the book. But my ultimate suggestion for a LISP is Clojure. Runs on the JVM, has good Java interop (and a huge community of open source software) and has nice syntax to boot (I love the use of [, {, etc. instead of just ( for the syntax to differentiate different data structures).