Re: 1600 ARC 10x42 or 12x50 ???
I'm a little confused with all these people saying you can't hold a 12x as stead as a 10x or 8x. That's completely false. It's only the perceived ability to be more steady. Its no different that seeing your heart beat on a +22 power scope compared to an 8x scope. You're heartbeat is still shaking your glass, you just don't notice it.
You'll still be able to get as good or BETTER readings from the 12x binos, simply because you'll concentrate on holding them EVEN MORE steady than you would feel the need to with a 10x.
Now, after all that is said, if that's something you don't want to see...then by all means, use 10 or less. I've got the 10x 42 Fusion that you speak of, and I would like to get the 12's simply because we've got a LOT of wide open country where I hunt and I'd rather have the extra zoom to know what I'm looking at, before I decide to make a stalk, or before whatever's coming is right in my lap.
Lot's of people don't have the open country to warrant 12x binos. I myself might not need it, but I certainly won't hurt in my hunting conditions.