This year I bought a pair of 15x binos and used them on a tripod. After that the spotter stayed home/in my pack. The 15s are amazing to look through for long periods, and out to about 1200 yards were good for getting a good idea of the size of the buck. That said, judging bucks farther out than that was pretty difficult. I'm going to try a doubler on the 15s this year. After using the 15s, I have no idea how I ever tried to glass with a spotter. Finding critters in the 15s is astronomically easier. As for choice of product, low end spotting scopes are typically pretty horrific optically. They'll be all but useless on high power and in low light. For your price range, I compared the Vultures to the Nikon 15s and 20s, and the Nikons eat them alive. The Monarch 5 (800$ or so) was comparable to the Vortex Kaibab, and handily outclassed the Vulture.