In general you acan say, that teh G-Shocks are equally robust.
The basic ones have basic functionality, more expensive ones add functions like solar, atomic time signal reception or temp/altimeter sensors.
The "Master of G" series has watches with an added special ability (Mudman - mud resist construction, and a compass in it´s latest incarnation, Gulfman - sea water resistant Titanium case, Frogman - ISO certified diving watch etc)
Then there are other series like MT-G (Metal twisted G´s) with more metal, Aviators with shock resistant analog Movements and m,ore...
I´d say for starters, get a DW-5600E, the newest incarnation of the classic G-shock.
And stay away from teh G-Shock section of Watchuseek...
You can find a G for any taste - subdued and simple to Hyper colored big beasts and Multi Sensor Fieldwatches.
DW-5600E partially covered by M-65


Variations in stealthed black...
