I am a watch nut and have way too many of the little things. They fascinate me I guess.
I would say to keep the price reasonable and for reliability, a Seiko automatic diver such as model SKX007K. No batteries to run out, can be read easily in the dark and it will take about anything without quiting. Toss the rubber strap and get a NATO strap in 22mm and you are set.
Another super option is a Casio G-Shock that is solar powered. Unlikely to ever need a battery (capacitor) change, very accurate, a light for night reading and a variety of features available. A good one is about $80US.
I kinda prefer the watch with hands because it is easier for my old eyes to read. The digital Casio is less expensive, more accurate and expendable. I do not like the straps, but you can learn to live with them.
I would think the Seiko would be about $150US.
The one I wear has been bead blasted, has a custom military style dial and hands and the 60 minute bezel was swapped for one with 12 hours for keeping track of a second time zone, like GMT. Like I said, I am a watch nut
Hope that helps. Cheers!