What kind of fabric do you like? There are lots in DFW and it also really depends on what part of the Metroplex you'll be in since the entire area is pretty massive.
In McKinney, The Quilt Asylum is huge.
In Dallas, Sew Lets Quilt It is an adorable little shop, and the owner (Patty) is about as sweet and funny as they come. I frequent their shop often!
In Lewisville, Quilt Country is where a friend of mine teaches classes, and she loves it there.
In Ft. Worth, Cabbage Rose comes to mind as a quality shop that has been around for quite awhile.
Not near the Metroplex, but if you're going to be passing near Abilene, Feathered Star is probably one of my favorite shops to frequent when I'm out in West Texas. The owner is a delight and you won't be sorry you stopped in!