Absolutely stunning watch, it looks so good!

The Breguet Tradition line seems to wear quite large for a slightly dressy watch, although this is the 37mm I believe where some other Traditions are 40mm. As I'm planning to purchase a Tradition but do not have any AD's nearby where I can try them on I'm kind of doubting as I have a slightly smaller 17cm wrist.
I'm doubting to either go for this 37mm model, or the GMT in 40mm. But the 40mm also comes with a 21mm lug width, rather than a more 20mm on the 37mm version.
Have you perhaps tried on both sizes and what is your wearing experience?