FWIW, my serious runner-up has been the Pentax/Ricoh WG-5, a worthy competitor to the Olympus TG series in that it's also rugged and waterproof. A major bonus to me is the controls and menu layout have not changed much from my older Pentax.
However, there's only one housing option I can find for the Pentax, from Recsea, and unlike Olympus, Ricoh doesn't seem to be supporting it with a lot of options.
However, there's only one housing option I can find for the Pentax, from Recsea, and unlike Olympus, Ricoh doesn't seem to be supporting it with a lot of options.