Looking for a low-key dive watch to round out a 3-watch lineup

Hey all—looking for a practical diver to complement my Datejust 41 (Jubilee) and GMT-Master II “Batman.” I’d like something under-the-radar that I won’t baby, but still won’t feel out of place at dinner.

Tried the Omega Seamaster and it was great, but the helium valve isn’t for me. I’ve heard good things about the Longines HydroConquest and Hamilton Khaki Navy diver.

What I’m after: • Subtle/less flashy than my current two • Comfortable daily wear, solid lume, 200m+ WR • Good durability for travel and more rugged days • Ideally 40–41mm (large wrist), reasonable thickness

Open to new or pre-owned. No hard budget—happy to hear options across price points if they fit the brief.

Would love real-world experiences and alternatives I should try on. Thanks in advance!