I have only worn the 5970R, so have had a chance to appreciate the proportions, dial layout of the 5970.
However PP reached perfection with the P.
As much as I love your 5370P, and the 5204P, the 5970 dial fills all spaces to perfection, and in this P version... well.... this is THE watch!
As you might be able to tell, I absolutely &%$£*& love the 5970P

.
You can't beat perfection, so I believe this watch will still be 'current' in 20, 30, 40 years time!