Nikon 4k. I've had it for 4 years now. Trees and bush out to 2400. Road signs out to past 4000. Deer to past 1200. Coyotes 790 is the furthest one I've had the opportunity to range. Single wire hydro pole to past a mile in good conditions. I had it out with a buddies Leica (best one they made 2 years ago) and they were pretty much identical, the Leica can just be set up to give you your drop charts as you range, the nikon is just a basic rangefinder. The Leica has better glass. Bright and sunny any rangefinder will loose significant range. Heavily overcast is where they get max range.
There is something about these newer technology 3000 to 5000 yard rangefinders, they cannot shoot through a fog, light snow, and dust. Nikons high end units can't. Leica can't. I had a bushnell 1600 arc that would no problem. But I could shoot coyotes twice as far as it around range them.