I tried the OpenELEC build from here http://www.horus.com/~hias/tmp/openelec-wolfson/5.0-rc-cirrus/

This supports the cirrus audio card out of the box, which is great. I had no problems using this for a quick test of XMBC/Kodi

But, It's not really what I'm after. It's a specialised distribution for Kodi. I'd rather use a more general purpose distro (so that I can modify it later)