I hate to say it...but it depends on what kind of diving you are doing and what you need.
I have 4
1) Omega Seamaster Chrono (mechanical watch) Expensive but you can use the chronograph underwater.
2) Luminox Navy Seal Chrono...not expensive, but can't use the chrono feature underwater because the buttons are not pressure sealed for operation underwater.
3) Citizen Solar powered. Tracks depth, dive time, temperature, and has depth and time alarms...nice...but no stop watch function for deco stops.
4) Casio Sea Pathfinder - tracks depth and dive time and has a stop watch function for deco stops....probably the one I use the most. Basically a bottom timer with stop watch and some added functions.
I have 4
1) Omega Seamaster Chrono (mechanical watch) Expensive but you can use the chronograph underwater.
2) Luminox Navy Seal Chrono...not expensive, but can't use the chrono feature underwater because the buttons are not pressure sealed for operation underwater.
3) Citizen Solar powered. Tracks depth, dive time, temperature, and has depth and time alarms...nice...but no stop watch function for deco stops.
4) Casio Sea Pathfinder - tracks depth and dive time and has a stop watch function for deco stops....probably the one I use the most. Basically a bottom timer with stop watch and some added functions.