I recommend trying them out yourselves in a store, because no two people's
eyes are alike. The edge of field sharpness will depend partly on what
focus setting happens to match your eyes.

I agree that it is important to evaluate the binoculars yourself. SO many
variables and for each person some are just more comfortable to use.

And some people like 10x50s for terrestial work, some think 8x42s or something
like the 8.5x44 Swift Audubons are best because it is easier to hold them
steady. Field of view is an issue too, higher magnifications mean the true
field of view is smaller.

Best to try em out.

jon