patekova
1840
Platinum Platinum Platinum Annual Calendar PLUS Chronograph
Despite the above, I think you should buy what you love. As far as "investment value" of a regular production modern Patek, I think you should consider your purchase an "investment" in your happiness - no more, no less.
Assuming you still can't decide - the 5905P is an automatic, platinum chronograph with an annual calendar feature. Usually when a complication is added to another complication the price is drastically higher. Here the platinum 5905 is $thousands less than the white gold chronograph!
So if I LOVED the 5170G with a few exclamation points I would buy it . Anything less than that feeling I would buy the 5905P.
Having said that, either way you can't go wrong.
Best, patekova
This message has been edited by patekova on 2016-06-27 08:40:55 This message has been edited by patekova on 2016-06-27 08:45:14 This message has been edited by patekova on 2016-06-27 08:46:09