Don't buy the 5140 the bezel of the watch is rounded and scratch easily also its close at the back. The best one is the classique 5178BR OR 5177BB if you like white gold enamel dial. Trust my advice... Enjoy
My opinion on the Breguet Marine 5817BA its a versatile watch can be wear sporty on the rubber strap or as a classique timepiece with a alligator strap, the case of the marine is quiet thick it will not suit a slim wrist and quiet heavy. You can not compare the marine collection and the classique it