mdg
10825
The 5327 is just not balanced...
...when they enlarged the case, they had to do something with the extra dial space to hide the small (although nice) movement. It was a design compromise. Some compromises are necessary, but at $100k this should not be one of them.
I'd also throw the 5172G. It is very classic and elegant looking imho without being overly formal. I am holding out for a version in yellow gold.
But of the 3 here, I'd go for the world time...love the yellow gold and it's a great size. Also, of course, it is a classic Patek complication.
Now the biggest question, how do you propose to buy either the 5231 or 5236 from an AD? Gray will be crazy expensive...if that is not a problem for you then congratulations : )