I am looking to buy a set of binoculars for mule deer hunting in southern Colorado. I have been using a set of 10x42 nikon monarchs but mostly because that is what I have used to whitetail hunt in Missouri with. I will be using these new binos on a vanguard Alta series tripod. My Budget is tight and I do not want to spend over 400 dollars. The two best options I have found are Vortex diamondback 12x50 (I can get them on ebay for around $200.00). Other option is to buy a set of vortex Vulture HD 15x56 (Usually bought for around $375.00). I have yet to find a set of the 12x50 viper HD in my price range but the moment I do I would Snatch them up. Is there a different bino I should look for? What pair would you buy and why?