This sounds like a compelling way to get non-emacs users to start hacking clojure!
Then, sorry if it sounds nit-picky, but hacking some clojure with a split-screen and REPL is not just like emacs. Cider [1] has like a million features that elevate it above just a repl + code. Then there's clojure refactor mode [2] which lets you rename files and keep the namespaces in sync, unwind threaded forms, and 30+ other things.