I would be nice to just select a county and see the quads for that county. Maybe you already have that and if so could you please tell me how to do that.
Sorry I missed this suggestion, I replied today to another commenter below who had the same suggestion. If we can figure out a way to add this to the website easily we will. If not, my reply to the other suggestion contains a quick work around using MS excel. Alternatively, as a GIS user, you can always download the SGID93.Indices.USGS24KQuads feature class and generate your own custom quad lists.