7X or 8X over 10X all day long for me. If I need more than that I'll get a bigger objective than 42mm and maybe a tripod mount. Power doesn't make the image any better.
Currently running Zeiss RF 8x45, Leica Ultravids 8x42 & Douvid 8-12x42
Some past all time Favorites - Swaro 7x30 SLC, Zeiss Nightowls 8x56 & Zeiss FL 7x42
Good luck
