... I think that it's a matter of sequence, not choice. HAHAHAHA! Let me explain:
1. First, it looks like you're a fan of the perpetual calendar complication - I understand that, as I'm a big fan as well. My first PP was the classic 3940P and as I am typing this note it's sitting on my wrist: an absolutely stunning, lovely, timeless piece that I doubt I'll ever sell or trade unless I am in such dire straits.
My recommendation then, given the preferences and constraints you noted above, is to go for your favorite variant of the 3940 (which metal do you prefer anyway?) and see if that satisfies your desire for perpetual calendars.
Plus, it looks like this will be the more palatable choice for your wife (not an insignificant consideration), given relative pricing. Although if you want a 3940P you're moving up there in terms of pricing too, I believe.
2. Second - and this is the sequencing point - will you really be happy with just one perpetual calendar? The answer may well be "YES, if I have the 3940" or "YES, if I have the 5059." But the truth is I'm not sure you - or anyone - knows the answer to that. I for one have space in my heart for a 5059 sometime in the near future, even though I have a 3940, 5040, 5136/1J and a 3970 now (whoa).
If you absolutely, definitively will be happy with just the 5059, then I suggest you gun for it. Otherwise, you might just hanker for "the one that got away" (a bad feeling). Same for the 3940.
Just my thoughts. The perpetuals are just so darn lovely, the cal 240 is PP's reliable workhorse, the finishings are superb. I don't have a perpetual right now with a retrograde function, and I may be shooting for another piece entirely but at some point I'd love to own a 5059 too.
AESTHETICS:
POTENTIAL MINUS of the 5059 (for me): Aesthetically, I don't like how the "15" and "17" are cut off by the leap year indicator. But that is a VERY minor point.
POTENTIAL MINUS of the 3940 (for me); Nothing. Well, except maybe the 3940P does not come with a display back. Which is easily resolved if you get a G, J or R!
My thoughts for now. Sorry for rambling on, but man, I love perpetuals. I am sure you will love whichever you choose!
I do kind of miss the sweeping seconds hand in the 3940 but others feel that it gives it a more "Zen" vibe (much like how others prefer the 3700 versus the 5711/1A).
5059 is a great piece! I'd be fortunate to have one in my collection (maybe someday)...
