FWIW.....
A buddy of mine sent me his GPO 10x50 RangeBino to see what I think of them and had them in the field for the better part of a month. I currently own a really great sample of the Fury 5000 AB, and he wanted to see how his compared as I recently finished out the mule deer season here in TX. I've been hunting whitetails with the Fury as well since early November, and My eyeballs see it like this:
Optics-GPO has a slight yellow tint and appears brighter than the Fury AB, but glassing with them both side by side on tripods tells me they both get you at least to the end of legal shooting light (30 min after sunset). Optics in both units are equally sharp, and they are sharp. No advantage either way in light gathering ability.
Build quality-slight edge to the GPO. They are very smooth to operate, and everything that is supposed to move and adjust does so very smoothly. The Fury works well though and I've got no complaints with it after extensive use.
Rangefinder-GPO is very fast to get a readout, the Fury is ever so slightly lagging, but is still fast. The Fury has more range than the GPO. I can get ranges pretty consistently on sandhills and tank batteries out to 4000 yds with the Fury, and the GPO will "only" get to 2800, which is plenty far enough. The Fury has been unaffected by cold weather ranging, the GPO has as well and they both ranged equally well in temps down to 20* which is as cold of weather as we've had. Both are light years ahead of the Geovid's I've owned in this regard and it's not even close. The Fury doesn't miss a beat at 15* F, which is the coldest temps I've tried them in while whitetail hunting up in the TX Panhandle. Very impressive to say the least.
I had never laid eyes on a GPO bino of any sort, and this 10x50 RF/Bino is very, very impressive. I'd own one in a heartbeat over the 3 Geovid's I personally owned/tried. I'll answer any questions if I can.
