Guess you have to ask yourself what your really willing to pay, if a $700 spotter is tempting I’d say neither a swaro or Kowa are really serious contenders due to price.
I had a gen 1 vortex razor 65, it was a great entry level spotter for sure but it doesn’t compare to the swaro I had and the 2 Kowa’s I currently have, It gets grainy much past 25x and clarity is vastly reduced at 48x. Many like to talk themselves into the lower price option as good and there’s nothing wrong with that. I think you’ll see that your current Athlon Ares is equal or better then the Vortex.
Now if you truly want a Spotter that will shine in conditions outside of perfect blue bird days you won’t regret the swaro or Kowa, the 77 will be heavier but will be better then the swaro 65, so you have to determine what’s more important weight or better optics and light gathering. Now if you glass mainly with your binos and can deal with using a spotter to verify then the Kowa 55 is a rockstar, crystal clear all the way to 45x and really only fell off in light gathering from my Sawro 80 HD by maybe 5 mins. The great bonus of the Kowa 55 isn’t it’s reduced weight to the 65mm options, its the reduced bulk, it’s much smaller which means less space needed for it, you can also then use a lighter weight tripod setup saving more weight then if you run a 65+.
Just food for thought but the Kowa 55 isn’t for everyone but it’s the one spotter thats always in my pack.
I have the Tines up adapter and it fits pretty much anything, the novagrade i have also has different rings to fit different eyepieces but you have to change them out.
This pretty much sums up my experiences.
I’ve talked myself into lower options many times. While some are better than others (I’m not Vortex hater either), the most important factor to me is clarity.
Clarity under conditions. I hunt wide open desert country for elk and mule deer. I need to be able to accurately judge a deer (as best as I can) at the furthest possible distances, especially in less than perfect conditions. Lesser glass has left me chasing 2 points miles out.
I’m not a horn hunter, but I do want the most mature animal I can harvest. So yes I’m picky. Especially when I’m fortunate enough to have an elk in the freezer.