G Shocks are made in the China Casio plant with Japanese parts. There are about a million variations, so look for the Atomic Solar ones. AFAIK, there are no GPS equipped G Shocks, MAYBE the Rangeman?
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I think the G Shock is the way to go for simple durability. A few questions:
1.Is the frogman worth the price to get ISO certified dive tool?
2.for the 6900 series, solar or not? I like the blackout battery models but the solar is attractive from a battery life standpoint.