NDhunter
Experienced observer
Choices were very limited for me last summer when I was looking to try and buy a mid-size 8x at a local B&M. Tons of options for 8x42 and even more for 10x42. The 30mm Nikon Monarch 7 and Swarovski Companion CL were my only mid tier options. The Leica UV+ 8x32 were also available locally, but a little more cash than I was looking to spend.
I suppose now you know what is the most used and best all around, and that is the 42mm size.
Most binocular users can handle a standard 42 size with its advantages of
easier view, brighter and is often offered with better optics.
Most users are able to handle the weight of the 42mm size with pleasure.
Jerry