Great scrappy design. One of your own?
Being that you said size is not the issue, I am with you on borderless and just add a binding. I would audition something of a strong or jewel toned colour that will look well with the quilt. Being that you know it's destiny, perhaps that colour would be one that coordinates with the setting. Although, with the multi-colours in the quilt, I wouldn't worry about the decor coordination!!
Perhaps what you might want to change the width of binding from the traditional. A little wider, may help you feel that you have a bit more of a frame. Yet, a nicely done narrower than normal can be quite effective on a quilt like this, and not overpower the glory of the quilt itself. My own instinct is the narrow strip around!!!
The key ... you already know, Watson ........... audition! audition!! audition!!!
As always, keep up the great work!!!