Eichler's on Coney Island avenue is one of the biggest (if not THE biggest) religious judaica store in existence today. Their stores are big and chock full of books and religious articles. They also have trinkets and items that help with some of the laws like kosher i.e. kitchen sponges that say milk or meat on them. Their stores are beautiful and clean and a pleasure to shop in. They are somewhat overpriced, but I would go to them any day.