Ghislaine has a valid point - feeling the pills after you've spent time creating a beautiful top might be a let down. Also, if you are machine quilting it, I have a feeling the needle may get hung up on the pills.
Matu - you are right about the wool blanket....almost makes me wish I lived in a cold climate. Almost!
Because cotton grows so well here, I was thinking what to do with it. Now I'm thinking I could felt my own quilt batting! Some heirloom cotton from the SW is actually a pale green in color - pretty!