My 2 cents when LR hunting was the reason I did LR shooting... Yes, I have experience with all viewing far away targets. Read the weather rating. MANY spotters are not weather proof.. nor are eyepieces.
Packing these 80mm monsters will get real boring real fast. For hunting, I prefer the straight eyepiece.
Budget buy - Pentax 65ED body. The small variable that is usually offered is junk. I add the one from the Pentax 80. Much better but you really only use the middle part of the mag range. Optics was very nice but there are other interactions with the body that are not ideal. Rule of thumb, variable eyepieces are not very good wrt to optics and you will rarely be able to use the full range.
Best is to buy proper single mag eyepieces.. Long eye relief will be a godsend. Pentax eyepieces are some of the best in the world and are weatherproof in general. Spend the money... yes, they are as much as most spotters complete.
For a bit more money, Kowa TSN 600 series and the 25X LER eyepiece... YUMMY. BUT Kowa tends not to be weather proof.....
The Flourite vesion is stunning but bring $$$$. With this level of optic, you will see alot even with "low" mag eyepieces.. unless you plan to shoot game beyond 1000yds.
I currently use the TSN-82SV (or whatever the letter are) for F class. Big wonderful optic. In clean air and the 25X LER eyepiece, I was glassing deer on the other side of Summerland and even count the points on a buck. Summerland is more then 2km wide
BUT this optic picks up mirage in a hurry (why I own it) so if you are hunting in dirty air, you are not going to see as much but still pretty darn nice. For F class, let's just say, they are popular....
I would never ask anyone to hunt in a back pack with this spotter.
So on a budget, bigger porro prism styles from quality brands will do alot but you will never want to carry them. For the roof prism styles, Pentax and Kowa get my nod.
Sorry, Nikon, Vortex, Burris, compact Bushnells aren't worth the investment.
The BEST that I have ever looked through.... Leica Trinovid.. when I win the lottery and can afford the best LR spotter and a crew to carry it.
Keep an "eye" on eye relief. Most eyepieces are horridly short. Why I never bothered with Swarovski and Sightron.
Kowa and Pentax long eye relief eyepieces are some of the best in the biz.
YMMV.
Jerry
PS since you are LR hunting, I hope you are also putting in the budget to get a good set of binos. You will do far more work with the binos then you could possibly want to do with a spotter alone. See the game with the bino, decide if you want to tag it with the spotter.
Here, Nikon is my pick and some amazing glass don't cost alot.