I think it's important to know what a high quality cotton fabric is. My rule is that anything thin or shiny is out, way too much sizing that will wash out or flake off. Also, a good quilting fabric should be smooth without any slubs, and definitely not brushed, (Hobby Lobby sells a lot of those). Anything too loosely woven is also not a good choice. If you have a hard time deciding if a fabric is high quality or not you might want to bring a swatch of a fabric you were happy with and compare it to fabrics you're thinking of buying.