As a Patek owner - the Calatrava 5146J Annual Calendar, yellow gold - I can only recommend them! Personally - I just don't like the Nautilus case shape, but I think perhaps I'm in a minority.
In any case, I would not have any reservations in recommending a Patek of any kind.
I have never had any issues when owning mine and it is running perfectly.
As an alternate - have you considered the Aquanaut? - 5167A-001
Mechanical self-winding movement
Caliber 324 S C
Aquanaut extra large
Sweep seconds hand
Embossed black dial, gold applied numerals with luminescent coating
“Tropical“ composite black strap
Fold-over clasp
Screw down crown
Sapphire-crystal case back
Water resistant to 120 m
Stainless steel
Case diameter (10-4 o’clock): 40 mm
(pic from the patek pages)