william schmaltz
WKR
Kinda depends what you're doing. I hunt a spot that is 4 brow/50 inch on a 2 mile lake in a mountain valley with a zodiak and motor. In that case, the spotter is a game changer. Most of where I hunt now is any bull on a simple lake drop with my feet as the only mode of transportation. I still bring the spotter, but it's dead weight. I just use it for taking pictures and looking at bulls that I'm not gonna shoot unless I can get them to camp. In the simple drop camp scenario, 15x would be a bit much. 10x42s and no need for a spotter unless you have the weight and self control.