Just a fine point of correction. Many years ago, Lemania was fully merged into Manufacture Breguet. And Breguet has updated this lovely classic chronograph caliber by, among other things, increasing its frequency from 18,000 to 21,600 and more recently changing its balance to free sprung with a silicium spiral. So to my mind, the right way to refer to the movement now is to call it Breguet.
I have a tendency to prefer some watches in white metal WG or Pt ( and 5070 and these VC chronos are among them ) but in any metal these are definitely gorgeous pieces.
I envy you, they are just superb. Excellent choice, wear them in the best of health.