You have picked up my 2 favourites Calatravas.
I love the rounded crown guard of the 5127, very similar to the one of the 5125. Also the rose gold is for sure a good choice (although I also love the platinum version with black dial as a very elegant dress watch but the look is quite different).
And 2526 is of course an excellent choice too. As Nicolas mentions, the PP crown is a small detail which ads really a lot to the beauty of this watch.
Congrats, definitely the choice of a refined Patek lover.
Best,
Mike