Mark in Paris[Purist]
10488
Tough question
This is the question I ask myself from time to time but I always find something not perfect as a daily wearer (it's a major criteria for me). Not considering value will make things easier 
The 5270G third generation silver dial was among them, so is the 5227R, the 5975G or 5131R.
Then a 5170P, a little more, for its beauty, uniqueness and proportions.
However, I would finally go for a highly complicated one for what it adds in terms of complexity, rarity and finishing such as the 5204R or 5370P.
Let's say today a 5204R (but next week it could be the 5370P).
Thanks for the Interesting thread
Best, Mark