If you could only have one pair, which would you have and why.

I would be using primarliy for hunting.

Bit of an apples and oranges comparison. The 42 MM glasses will perform better but will be heavier. I have both and the 8x30 Swaros go to Africa. The Leicas are for use in a deer blinds. My new favorite is a 7x42 Zeiss Victory so go figure.