For $150 and under, Bushnell Banner or Trophy, Nikon Prostaff. For under $300, Nikon Buckmaster, Leupold VXII, Burris Fullfield, Bushnell Elite 3200. I'm sure there are others but these are the more popular one's that I have seen. Check out Ebay, Midway, Cabelas, SWFA and Natchez you can find some pretty decent deals. The Burris and Leupolds will have some package deals available that come with a range finder, binoculars or spotting scope.