I have used 10x42 for many years with zero complaints. Then this last season I got to spend a lot of time behind swaro 15x56 that I absolutely loved and got me thinking….. There are some hunts where the 15x would just be too much, I could either keep my 10x for those hunts (I don't want to pack 2 pairs daily) or more than likely I will switch to 12x50's and just run them for everything. But I mostly hunt big open country and I surely realize that doesn't work for everyone.