As a retired Leupold dealer I sold piles of Leupold scopes and binoculars, as well as spotting scopes.
The Leupold BX-2 Alpine Binoculars are a decent set of glass. Price point was right in those days, and I only had one pair that needed replacement under warranty in hundreds of them. I think I sold close to 300 sets in four years.
Burris Droptine binos were the second most popular models I sold. They too are very good for the money. The Leupolds were a little clearer and had nicer glass.
Vortex is junk from my experience, although not a pile of experience, but I know they are sold with a good warranty because you will use it. In addition, most Vortex entry to mid level anything is Chinese sh!t. Only once you get into Philippines' and Japanese glass they do get better. And then the price sky-rockets. So in my humble opinion, stay away from Vortex.
Nikon glass is very, very nice. I've had a few different models of Nikon binoculars and scopes. They are crystal clear, and back then they were Philippines glass as well.
For me, the rule of thumb is usually this:
Chinese glass is junk and should be avoided.
Philippines and Japanese glass always seem to be top quality.
I think you cannot go wrong with Leupold, Burris, or Nikon. They all make very nice and clear glass with lifetime warranties.
Good luck on your decision......