Bonnie Hunter mystery quilt - 2014

This is what I have finished so far.  I have decided not to use the sashing that were made because when I put the greens up against the blocks --- well they just looked terrible.

I would like to know if I should use a medium to light grey to sash these blocks.  I'm thinking that if I do use grey it will made this quilt less busy.  What do you think?

Blocks finish 12" and I'm planning on 4 across and 5 down.with grey sashing and a boarder this should be a nice sized quilt to cuddle with.