Thirty years ago we sold a lot of poly blends at JoAnn's for quilting. Some lovely quilts were made. I used poly blend in solids then because I didn't care for the feel of the cotton solids that were available. The quilt in my playroom looks and feels just fine. The plaids and prints are cotton but the some of the solids are Symphony.
Use the fabric. It won't shrink and it won't fade as much as cotton. Poly does have some advantages.