I used a Pellon recycled fiber 80/20 recently - about $15 for a queen with a coupon. It made a nice heavy quilt which is what that daughter wanted. She says it's washing very well. Hobbs 80/20 is on sale at Connecting Threads - about $14 for a queen, I think. I like that one, too. Free shipping if you order $50 worth of anything, which isn't hard to do. At $7 a yard, the batiks are hard to resist.
I've used a Quilter's Choice 80/20 by Fairfield from JoAnn's. I liked the first ones, but the last seemed light, but it was right after the heavier Pellon one, so that may have been why. Mountain Mist polyester made a nice feeling quilt for a daughter with allergies who wanted a lighter, but warm quilt.