I don't like poly b/c of bearding but you said you aren't going to wash it. Since I've washed anything made of poly batt (which I don't buy anymore)I don't know if non-washing would make it beard or not. I'd go natural all the way!!!!!!!! Although I do like 80/20 for hand quilting.(doesn't beard) I can't wait to see it, sounds fantastic!!!!! :D
Please be sure to show us!!