I think the Lange perpetual is a great choice for a complicated dress piece. The aquanaut is an attractive watch as well, but my issue with it is that it's a currently hype piece with a huge premium, and at the same price point there will be some far more interesting offerings that you can get, both within and outside of Patek. Or you can get something else that's comparable, and save a ton of cash to put towards the 2nd or a 3rd piece. The immediate substitute I can think of for it would be an Overseas, Tim Mosso did a good video comparison here you should check out: https://www.youtube.com/watch?v=kNVNhwh1QTA.