I agree about the DOF, gives these an extra 3D pop. However, on the DOF in low-light thing, it seems like you are kind of cornered by your equipment. You might try a faster film, and then you could stop down more, pick up some DOF...or maybe stop down and then push the film in processing, if your lab will do it. I don't shoot film and so I'm not sure how much you can push the different films.