This is the one you want. Fenix 5X, sapphire glass, stainless steel case, optical heart rate, all the features you want. Super smart GPS modes, 16GB of memory to save GPS/topo maps. Ability to get topo maps. Bluetooth connectivity.
I'll get about 1 week of battery life out of this doing about 20-30 minutes of GPS exercise a few days a week, plus being connected to my smartphone and used for notifications.
You'll notice the outside of the band is scratched a bit, but the glass is still perfect.
Dropped to $350 (I'll cover PayPal fee) shipped to you.