The 80/20 is perfect. It's worth it to try different battings as your needs differ depending on your use for the quilt and where you live. I prefer higher poly battings because they are warmer (I live in MN).
By the way, using the
Big Foot can help a lot when quilting with all poly battings. I used this for 4 or 5 years when I had my Kenmore (gotta get around to listing that in the Trading post as I no longer have a machine that uses that foot).