I have a number of watches that I wear on a daily basis and when I dive, etc. My favorite is this one:
Solid, military reliability, and just a beauty! It has some really cool features such as the tritium gas filled markers and 1000ft rating. I wouldn't have ANY concern with diving deep with this watch. If you are really concerned about the watch coming off, you can get the Maratac Zulu 4 buckle strap.