We do tons of glassing here in Utah from very long distances. Many use spotting scopes however, a lot of us including the guides just use a high powered binocular 12x50's and some use 15's. They are a lot quicker for us to put on a tripod plus it eliminates the bulk of packing a spotting scope around. I've hunted whitetail in Texas a few times and every time was from a tree stand. A spotting scope would have been too much because I wasn't glassing a hillside from a long distance. A nice pair of 8 or 10 power binoculars would do the job. Plus you save the expense of the spotting scope which can run upwards of $1500 or more depending on the brand. You also have to consider how often you'd be using it. If you do decide to get one, make sure it has a great warranty.