There's always a better picture out there. 100mm scopes will outperform 80's and those will outperform 60's and so on. $3k scopes will outperform $2k scopes, and those will outperform $1k scopes (and so on)...
So you have to set some limits in the optics world and that will help you narrow down your selection. There are just so many choices now.
For true backcountry gear, my personal weight limit is about 2-2.5 lbs. for a spotter, and less than 12" in length. That way, it fits into a side pocket on my pack and is easily reachable when I need it. Other folks are willing to haul in bigger heavier scopes. But generally speaking, that's because they are interested in trophy hunting and they are looking for individual features on antlers. If you're just trying to tell if an animal is legal or not, a whole lot less scope will do just fine. For instance, I spotted a herd of bull elk from over 2 miles away with my 10x binoculars (on a good tripod) and could verify that at least two of them were legal (4 points on one side in CO) just with those binocs.
If you're just trying to verify whether an animal is legal or not, good quality binocs on a sturdy mount will do that for you - no spotter needed - within most reasonable distances that you'd be willing to chase that animal on a given day.
I find I use my spotter more from the vehicle anymore and less in the field. But I couldn't live without a very good pair of bins on a very good tripod mount. That setup gets about 90-95% of my time anymore.