Good luck.
I would second some of these suggestions, such as -especially for quilting fabric carry the lines JoAnn doesn't carry-(Moda does seem popular with lots of peeps on the board) and since you are going for more modern lines check out some of the various ones.
Also speaking from experience DO have Samples of things on your walls. I have bought a book at the LQS that had a quilt that was on their wall. Love the quilt and even though I can't start it yet, when I'm ready I want to have the book so I went ahead and bought it, as one never knows when a book will be out of print. And if they are looking for their next project it will appeal to them seeing it made up. If you will be doing classes have a sample of something from it as when customers see it made up some will sign up for the class as a result of seeing the project.