What about obsolescence? Hunters aren't much different than other folks in that they are always looking for the latest and greatest. Sure, there's a point of diminishing returns, and in the past few years, great strides have been made in rangefinders, so the need to constantly upgrade (out of necessity) will be reduced as time goes on. I can picture the average guy buying 2-3 rangefinders before upgrading their binos. I absolutely believe that a pair of rangefinder binos on a tripod is much better than a handheld to give an accurate reading. I am thinking of two things....will the rangefinder crap out after a point in time, and you're stuck with a pair of binos whose rangefinder doesn't work. And the second thing is for the gadget junky....if you always have to have the latest tech, than dropping $3k every couple of years is pretty tough, even with good resale values of the top end stuff.
My own personal experience is very limited, so I hesitate to opine on the optical clarity differences, but I have looked through both the Fury HD and EL Range in the field during a hunt. I had never seen "regular" ELs at that time, so I didn't have anything to compare them to. But the Fury HDs were noticeably, if not very much so, producing a poorer image than my old Leupold Mojaves (original Mojaves....pre "guide" series, pre-BX series). I am not sure what level in Vortex' line the Fury's glass is supposed to be, but it wasn't great. They appeared darker, less crisp, and made it feel like the day was overcast, even though it was a sunny day. And, my Mojaves, while adequate, don't have much of a "wow" factor. My guess is the higher end glass has enough top end that a slight loss is a reasonable tradeoff?!?
Me personally, I just picked up a new Sig RF and it works great, Saving up for a pair of high end 10x42s right now. Would love EL 10x42s, but unless a great deal comes up, the SLC 10x42s may get the nod. Had I not just picked up the Sig RF, I might think differently.