Weaver Super Slam Binoculars
http://www.opticsplanet.com/weaver-supe ... ulars.html
A number of 8x42s and 10x42s will fir most uses and be superior in optics.
Actually, quite a decent Japanese made binocular in that $600 price class. It's an open bridge version of the old Grand Slam, which was a pretty good binocular, though a bit on the heavy side.
http://www.opticsplanet.com/bushnell-el ... glass.html
the Legend is fine optics.
http://www.opticsplanet.com/bushnell-10 ... guard.html
There the 10x woks for me anytime but the 8x takes some adkusting due to the eye cup design.
The Pentax ED is a little pricey
http://www.opticsplanet.com/pentax-10x4 ... ulars.html
I have a pair of these, they are fine, but not quite the expereince of ED glass
Any decent 10x will do and the ones ET listed are all super choices. For open country work, I often use a spotting scope, so that's another option you may wish to consider.
I'd rate the Pentax ED superior in contrast and resolution, but you'll have to decide for yourself if that is enough to spend the extra bucks to get it. The Pentax ED isn't really going to show you more than a good bino such as the Weaver Super Slam, but I think you'll enjoy the view, more.