http://www.nikonchat.com/nikon-prostaff-rifle-scopes/

The choice of a rifle scope?
I'm trying to find the scope for a 30-06, I think it's between:-Leupold Leupold VX-I- rifleman-Nikon-Nikon ProStaff Buckmaster this field need to be waterproof, withstand cold down to -40 degrees, and work well in low light conditions Please tell me the advantages of each scope, or if you have any other suggestions for telescopic sights around $ 200, please list them.
This article on areas can help. Leupold VX-II (two instead of one) is a wide margin and is commonly used in Alaska with no problem. Should be around the range you're looking at price.
Springfield M1A Socom II Indoor Range Test