Spotting scopes seem to be like rifle scopes, in that everyone will tell you to buy the best, and that means Kowa.
I have a Kowa TSN 821, the 82mm with a 27x LER (long eye relief) eyepiece.
When you buy these, you buy the scope body and eye piece separately.
27x seems abouy optimum and appears to do everything you want.
You can also get zoom eyepieces such as the 20-60x but to be honest, you don't need that kind of mag when shooting.
For one thing, when zoomed too high, things tend to get a bit shaky and dark.

The Kowa really is excellent and I can't imagine being able to get a better scope.
Not cheap though as the whole thing cost about £550 IIRC.
You'll also need to make sure that it's waterproof and possibly buy a jacket for it and then of course, you'll need a stand for it.
The tripod type stands really aren't up to the job and it's best to buy a stand that has been made specifically for the jop of holding a shooting spotting scope.
You can really only get these from the US and they aren't cheap either.

Before I bought the Kowa, I had a Opticron HR66 with a 20x eyepiece which was excellent but just decided to treat myself to a bigger and better one.

The difference between good scopes and cheap scopes is like the difference between night and day.
Good optics are always costly but apart from being able to see where the soptting discs are, a decent scope will also allow you to read the mirage for wind, watch bullet trace in flight when spotting or coaching for others and given the right conditions.....see bullet holes at 200 & 300yds.

A cheap scope is usually dark and blurry and won't allow these things.

Also, get a scope with an angle'd eyepiece, they're much easier to use.

You can get decent scopes from most major manufacturers.
I bought mine from Ace Camera's in Bath

Mark

Not that I've seen.
Doesn't mean it's a bad scope though, but I would be tempted to trial one before buying though