8X42 Vortex Diamondbacks are a good pair, and are great for price vs performance. They have a great lifetime warranty. 8 power gives you a decent magnification that you can usually hold steady. Higher magnifications tend to be hard to hold steady. You should avoid zoom binoculars because they usually have inferior optics. Spending more than your current target range has demenishing returns. You wil see some improvement with $100 more, another $100 will will only show a slight additional improvement. $2,000 Swarovski binoculars are a wonderful piece of optical engineering and offer unparalleled performance, but most people cannot see the $1750 difference.
I agree you should try out binoculars to see what works well for you. If you have an Audibon Society store nearby it is a great place to try out various brands and they have a knowledgeable staff. Sometimes sporting goods store employees lack expertise and will just try to make a sale.