WOW! I'm overwhelmed by the response and the great ideas, everyone.
I knew this was the forum for my question!
Looks like wonder-under is the way to go - I'm guessing the 805 is the lightest, but I think I'm going to find out, once I get to joann's!
ps. jljack, that's a beautiful machine as your avatar - what kind is it? and, do you sew on it?