RE: Best all around binocular powers?
A hunter really needs 2 pair of binoculars. IMO 8X is the proper magnification for both. Then buy the best quality glass you can afford.
I have a set of 8X56 binoculars for my fixed position stand hunting. They are very heavy. But in a fixed position weight is not an issue. And the larger binocular is the best dhoice. I also have a quality pair of 8X30's. These binoculars are very lightweight. You almost do not know they are hanging around your neck. Make sure the glass is of high quality. The only time I miss the bigger 8X56 is the first moments in the morning, and the last moments of the evening. But for the other 99% of the time. They are more than adequate.
I do not know how much the Nikon 8X42's cost. But compare that binocular to the Zeiss Conquest 8X30(the ones I have), or the Connquest 8X40 before you buy the Nikon. IMO you will change your mind. Tom.