My wife had a Vortex Viper 15-45 X 65 for a while that she used to "watch" wildlife in Yellowstone. When we were looking at the same thing, a wolf den for instance, she got frustrated because she was not able to see the things that I could with my spotting scope; a Swarovski 25-50WA X 80.
The Vortex went down the road and she now has a 20-60 X 80 Swarovski which she really likes.
I know watching wildlife in Yellowstone is not hunting, but being a hunter I look for things that hunters look for, points per side, full curl, etc. and I find myself using the 30-40X magnification a lot, then turn it up for details. I have never felt "under powered" by having 50X as the highest magnification on my scope.
You will never regret getting a high quality spotting scope (or binoculars).
ClearCreek