Phil,
Just curious, but what kind of use will these binox be involved in? What kind of terrain? If you live in an area, and hunt in swamps like I do in Northern Michigan, 10x binox are too much power. And, 10x binox are much harder to use than lower powered ones like 8x or 7x. The 10x binox are hard to hold steady, and the field of view is less than the lower powered ones.
Generally speaking, you get what you pay for, and I think that's a fair statement when it comes to binox; the higher priced Zeiss, Leica, and Swarovski binox are going to deliver a better image than ones that are half the price. I don't know how much money you want to spend on a pair, but I guarantee you the high priced ones are outstanding. I have two pairs of 7x binox that are excellent, a pair Meopta and a pair of Swarovski's. The Meopta's are about half the price of the Swarovski's and are VERY close in terms of image. The Swarovski's win in the area of color rendition, but not enough to worry about if money is a problem for you.
If possible, try comparing several different binox to see for yourself.
The comparing, to be meaningful, needs to be a stack type test, where you alternate looking through one pair right after another. Looking through one pair one day, then sometime later looking through another pair won't get it.
I have some 7x binox that are just right for where I live and hunt.
If you live out west, and have wide open spaces that you'll be viewing, say Antelope hunting, then 10x might be good. However, a cheaper pair of binox in the 10x range "may" not provide the distant detail that the very expensive Zeiss, Leica and Swaro's will in 7x or 8x. And, far and away, the lower power binox are more user friendly. If you're going to look through binox for any period of time, I guarantee you that you will be a MUCH happier hunter using the very expensive, low power binox. Eye fatigue is a problem when using low cost binox and looking through them for long periods of time; like searching for Antelope and Elk, sitting on a mountain side.
In addition to the Meopta's and Swarovski 7x42 SLC's that I have, I have a pair of Zeiss Victory 8x20's that fit in my coat pocket, and weigh about 9 ounces that deliver a MAGNIFICENT image for their size. The Zeiss Victory line is the higher priced line of Zeiss binox, a step up from the Conquest line.
Spend time thinking about how you'll be using the binox, then decide on the power you really need. Then look at your checkbook, and figure out how to buy the very best binox you can afford.
Have fun shopping foir binox. They can make a huge difference in hunting, or bird watching.
Martyn