Welcome aboard. I'm new here too.
Having worked in 2 quilt shops for over 20+ years in Pa. then Iowa I know that only a "real" quilt shop sells quality fabric. Some manufacturers you love and trust and others...not so much! The same applies to quilt shops! (Joann's, Hobby Lobby and Walmart are NOT quilt shops.)Manufactures produce fabric specifically for "quilt shops" and "not to be sold at chain stores".
I prewash and dry all of my fabrics. Good fabric does not fray and tangle excessively when it comes out of the washer.Cheap greige goods come out in a wadded ball of threads. Bare in mind that manufacturers use different quality greige goods for different "fabric lines" so while you may not like one line another may be just what your looking for.