I like Scheme too, for most of the reasons that you mention. I do find that it is so minimal that various implementations come up with different solutions to the same problems. I’ve settled on “PLT”:http://www.plt-scheme.org/.

Luckily there is the SRFI process found at schemers.org to help create standards. Also, you might be interested to know that there is an R6RS currently being drafted at r6rs.org.

Good luck. Keep us apprised of your journey.