On the size boxes we use:
 
I converted from a deep + medium supuper operation to all  mediums a few
years ago, and have never regretted the change.
 
Most of my hives are in "hike in" locations, and a full medium is a good load
under those conditions.  Also, by using mediums for both brood and supering,
I always have plenty of drawn comb available, as well as a lot of flexibility
with box locations.
 
W. G. Miller
Gaithersburg, MD