Also, for noise considerations, you should look at color prints unless you only work in B&W: to me, by far the most objectionable consequence of noise is the "confetti" of color noise.
OK this is what I have found so far. At 200 iso size 16x21inch colour print made with R1800(cropped section on A4) and premium glossy, waist lenght portrait, with mixed light, umbrella flash & fluorescent/daylight and 80mm afd lens, image looked superb with very fine film like noise/grain. Very sharp. I wouldnt hesitate to use the zd at 200iso
Iso 400 at same size and same image - not so good. Printed to size 13x17inch, not great but much better. B&w far more acceptable and filmlike
Made another col print at size 18x25inch of a sunny outdoor scene at 100iso, with no visible noise and very sharp and detailed (150mm afd lens)
All images on raw, opened in photoshop with focal blade sharpening, light to medium.