I think whenever Rolex goes beyond 40mm, it gets real tricky and hard to get it right. Sometimes I get the feeling that I'm looking at 2 dials, one superimposed on top of the other (Rolex tried to fix this problem with the newer dial). I briefly thought about it before going with the Aquanaut Travel
In 20 years, when the flimsy bracelet/endlinks/clasp of the mass-produced 16520/16523/16528 will have loosened to such an extent as to become unwearable (many already are), the 16518/16519 will have stood alone the test of time, literally.
It's better proportioned. The 5968 is a bit too large and fat IMO. Not to mention the date window at 3 O'Clock makes the dial less balanced. And don't forget that the 5164A has already been out for 8 years, and it will probably be discontinued soon. Selling now will definitely cause you regret in th