You could just try your hand with racket. The syntax will be different in some places (e.g.: the use of when), but it'll be close enough and you'll have a decent editor with a humane UI and a serviceable REPL with a debugger.
Ah, I forgot. Check out the nightly builds on their site. DrRacket (the IDE) has been revamped to use GTK+ on Linux and no longer looks like arse (if you have a non-arse looking theme).