If you are looking for current fabrics hands downfor me its Favorite Fabrics.... great selection , wonderful staff , and reasonable prices for current fabrics.
If you don't mind fabrics that have been around a bit.. its Thousands of Bolts... they do stock a few current such as the entire line of Stonehendge and most of the Hoffman Watercolor Batiks. They have a very large selection of quilt backings. Do use the find a fabric feature as they really do have thousands of bolts.