The models look very nice.
If it helps at all in Med 1 quant is approximately an inch if you notice at the bottom right of Med gives the model xyz in quants. So an average size male would be about 36 quants above and below the origin or 72 inches.
This might help with sizing the models in game. Bones also can be resized in Med in bones mode. So to resize the model you also need to resize bones separately in bones mode.
Hope this helps.
Guardian