Besides Clojure, I've used Racket the most. The docs are good, and I usually am not a fan of IDEs, but DrRacket is somehow comfy.
You can even add paredit to DrRacket. https://github.com/yjqww6/drracket-paredit
so who here has played with Shen? http://gravicappa.github.io/shen-js/shen.html#.doc/welcome.html
I looked at it when I started looking at co, but I didn't really get it..