FatQuarterShop.com is my favorite. If the fabric they are selling is not quilt shop quality, they tell you in the sample. An example would be some children's popular prints from Camelot. These fabrics are popular and Ok to use but just not quilt shop quality. Great website, good customer service, and at 10:00 am every morning they have a flash sale which is usually a 50% off sale. I buy most of my fabric from them!