Did you mean designer by "line"?
My ultimate favorite: Marimekko (and of course it's hella expensive... what can i say? I've got expensive taste I guess!!!)
And there are also the fabulous fabrics & prints by: Alexander Henry, Micheal Miller, Lonni Rossi, Munki Munki, hmmm... I always forget to look at the designer before I cut up the fabric, so it's hard to think of anymore....
Oh, I love these too! I plan to have a few styles of Marimekko and some other pricey lines. One thing I'm insistent about with my new site is that people should be able to order fractions of a yard (most sites I've seen require you to buy at least a yard.) Even if you can't afford a whole yard of Marimekko, a quarter or a yard can go a long way in a purse, quilt, or other project, right?