I am going on a school trip to New York next week but don't want to take ~$1000 worth of camera equipment that can be stolen and my old P&S doesn't fully meet my high standards for image quality. I am thinking of buying an old Pentax SLR (some manual focus 70s model) and a ~$100 prime lens to go with it to supplement my digicam when IQ is essential. Is it a good idea? Is NY (Manhattan) full of photo opportunities that will make use of an SLR or will an old P&S (Canon A70) do? Note: I want to go pentax because I like Pentax and all my equipment (body and lenses) are Pentax/Pentax compatible.