I've always fancied the Reverso since it is a true icon in the world of watches. The MC series is a fantastic line of watches. My only reason for leaning more toward the Reverso is my Dad has a MC 8 Day Reserve that I might inherit some day. I can tell you I was traveling a few months ago and I got to try on the 1931 with black dial...its stunning. I think an open back would be killer on that watch, but I understand in keeping with originality of purpose and design that they used a solid back.