I have owned a bunch of different binoculars. Coming from a professional photography background, I have a fondness for great optics. I have been very happy with my Swarovski 8x30's and 8 x20's. Excellent construction and feel. Superb optics. I have found the Zeiss Victory series of binoculars to be very good as well. I have settled on Swarovski optics as my favorite. Great customer service as well.
There is a lot of "good" glass out there these days, in the lower priced binocs, and it is all pretty serviceable. However, there really is a difference in the " superior" glass found in the upper end binocs such as the Zeiss and Swarovski class of glass. That's not to say that the more commodity priced stuff won't suffice, but in the case of optics you really do get what you pay for. Spend what you can afford, but don't scrimp on a few bucks saved now, in place of the superior glass. Clarity, crispness, efficient transfer of light, contrast, warranties, etc..., this is what you gain in the higher priced pairs of binocs. In general daylight conditions, all "good" glass performs reasonably well. In the early and later parts of the day, the magic hours, is where the better glass will show its worth. Buy the best you can afford, and the old saying is true...buy it right, buy it once.