I just received this watch yesterday, and the thing that seems to keep coming to my mind is how "pitch perfect" the 5140 is- from the dial, to the heft, and balance of the case. I hope I will maintain this opinion as time goes on.
I placed a stainless steel IWC Mark XV deployment on the strap for now- I find that the Breguet clasps a bit rough on the strap.
Here are two quick images-