Loads of wonderful flannels out there. Some name brands that I have never been disappointed with are Moda flannel, Wilmington (the regular not the wide, I found their wide back to be on the thin side), Maywood, Marcus Brothers and Northcott. They are all super soft, nice and thick and I have had no pilling.
The wide back flannels that Sew Batik carries are also very nice but expensive:
http://www.sewbatik.com/SearchResult...CategoryID=168