I have the Nikon 10x50 Action Extreme, which is around $180. First, 10x is hard to hold steady, but that is true for any 10x. Also, the Nikon focus can be dialed in pretty close but "infinity" focus is real far and focus must be adjusted even from long distance to very long, like maybe 1/2 mile to farther. Not sure if this is true for all 10x.
I have no experience in its durability in the field; it has been carried around some with me on foot but just on walks, not banged around much.
Lee