It depends what you need them for. Is the long range viewing going to be for detail, or just for looking around? If it is for detail, I would say 10x is a good choice. For outstanding low-light performance, 8×42’s are the best choice.
I’ve been pretty happy with 10×42’s in the past. My next will may be 8×42’s though.
SWAROVSKI 8X30 SLC. PERFECT FOR BOW HUNTING. SMALL, LIGHT, AMAZING LIGHT GATHERING, AND HUGE FIELD OF VIEW. TIP: BUY THE BEST QUALITY GLASS YOU CAN POSSIBLY AFFORD. YOU WONT REGRET IT. LIFETIME WARRANTY. BUY GOOD ONCE, AND NEVER BUY AGAIN.
I have the Nikon 8X42’s for hunting and love them.
And legal for most 3D events. I learned both of these lessons the hard (expensive) way
Get to a store when theyre not too busy, and ask to take them outside. You’ll learn power is not a major advantage, even going from 8-12x. Also, a lesser quality lense is going to give your blurry edges, taking away from the size you pay for.
FWIW, I first got the 10 x 42 EL Swaro … the image was larger, but the resolution was less … more eye fatigue and less clarity. I took them back and exchanged for the 8.5×42 and have been very happy. The image is sharp, so no eye fatigue, and the light gathering is much better.
FWIW, 8.5 mag is the largest allowed by IBO rules.