...I believe such a watch cannot be bought based on photographs only or comments from Purists friends. Such a watch (whether 5970 or 5170) must be tried in the metal to check how comfortable it feels on your wrist, how you like the design in real life, and most important what emotions it brings you when you look at it. This is at least what I would do and I am convinced it will help you a lot to clarify your mind for taking a decision. At the end in both cases, you gonna have a splendid watch anyhow π