As I wrote on a similar thread recently:
Optics is one category of products in which quality generally corresponds very well with price. Try looking through a Nightforce scope. (Not that many can afford several, or even one.)
In my opinion a hunter should spend what he/she is willing to spend on a scope while realizing higher prices get higher quality optics. And has been noted, higher quality tends to offset the perceived need/desire for higher magnification. In my case, that means Leupold VX-III 2.5 X 8 scopes on my .270 Win, 7mm Rem Mag, and .300 Win Mag are fine for shots to 400 yards and somewhat longer.