My very favorite batting is Fairfield Softtouch. ($40 for a queen size!) Oh, it drapes like melted butter....
But I can't afford it, so I buy Hobbs Polydown. It is 108" wide and a 30 yard roll. Cost is $86, plus $25 shipping.
It makes my quilts drape nicely. I've been very pleased with this batting.
http://www.longarmsupplies.net/hobbs...wnbatting.aspx