For the money, Leupolds are hard to beat, IMHO. Be sure to compare warranties, because not all warranties are equal.
The higher the power, in general, the greater the eye strain, unless you spend more money for better optics. Also, the larger the objective lens, the heavier the binos will generally be.
8x42s are a good all around comibination for size, weight, magnification, and low light capabilites. The more open the country you hunt, the more important binoculars are, because the more time you will likely be glassing.
Two predominant designs are roof prism and porro prism. Roof prism binoculars will have straight tubes, while porro prisms will have tubes that are offset and wider. Roof prisms are typically more expensive, but are less bulky, and in my experience, more durable. Steiner makes a reputable porro prism that isn't too expensive but has a good reputation, though.
Try an internet search for "selecting binoculars" and you will get numerous hits with a lot of good information on how to select the binoculars that will work best for your needs.
As has already been suggested, go to one or more stores wtih several brands of binculars, including lowto high dollar and see the differences for your self. You will find what you need at a price you are comfortable with.
One more suggestion. Buy a harness for your binoculars. It will be well worth the money and it will keep your binoculars close to your chest when you shoot.
Good luck!