Hi Josep,
this is my M1:

58cm bottom bracket to top tube, 59cm top tube length. One 3cm spacer, 90mm stem with 0°. Usually I prefer a ~60cm frame with 57...58cm top tube.
Riding with luggage is ok, but only with rear bags a little bit nervous. Painting is not the best, so if you have someone who does a good painting job buy the frame unpainted.
regards,
Michael