I have been serious amateur photographer for about twenty years. At one time I was using a SLR and photographing almost exclusively in black and white. For photographs in night clubs I would use 3000 ISO B&W film.
Since those days I have shifted to a Canon 40D DSLR. I still miss having the ability to push to 3200 ISO but the Canon 40D can go to 1600 ISO and I think I am getting some good results.