If you absolutely want to never worry about getting the device wet and can accept the aesthetics of the original Pebble, that would be my suggestion to you. The original Pebble is cheaper, has many options (especially on Android) and can seriously take a beating and keep functioning. I, personally, have put my original Pebble through hell... It has been soaked & completely submerged in water, oil, coolant, soap, dirt, grease, etc. Don't get me wrong, my Pebble is scratched up, but it has survived and has no issues functionally.
If you want some more features, like a microphone, voice actions and a bright color screen, I'd suggest looking at the Android Wear watches. My personal favorite & daily driver at the moment is the Asus ZenWatch. Just be careful and try to treat these watches more like you would your cell phone... In other words, don't go beating it up and wearing it in situations obviously unfriendly to electronics.
One more thing, I'm sorry to hear about your experience with the Martian Notifier... I enjoyed mine and, in some ways, think that the simpler Notifier is the best Martian smartwatch out. I personally like it better than their "Voice Command" watches like the Passport or Victory. Sadly, I've always wondered about the build quality of the Notifier due to it's relatively inexpensive plastic construction.
Best of luck... Let us know if you have any more questions or what you end up going with.