Opinion of a hunting club manager:

Low class scopes-
Anything available at walmart

Mid class scopes-
Simmons, bushnell, etc (unless it comes from walmart)

High class scopes-
Nikon, Leuopold, Upper end simmons and weaver

Premium class scopes-
Zeiss, Kahles, Swarovski, Schmidt & Bender

I know I have left some out, my point is this....as you all know, big bucks often appear at first or last light, but they dont have a clock or watch the sky to be sure that they get out in the field in time for you to see them. With that in mind......

Low class scopes- you can hunt until it's almost dark.

Mid class scopes- you can hunt until its pretty much dark.

High class scopes- you can hunt until the big boy actually gets out in the
field
Premium class scopes- you can hunt until you get tired of sitting in the
dark, waiting for the big boy to come out!