I'd second the G-Shock. I mean I'm sure you could pick up an auto that would do the job well, with money no issue. Generally speaking though, I have a GW-M5610-1ER which is the standard G-Shock proofs, recharges via solar (hasn't dipped below full battery in the last 5 years), and syncs up via radio frequency every night. Ticks all the boxes, and looks pretty understated without the typical ostentatious G-Shock look.