From Guns.com:

Whenever I am outfitting a new rifle with new optics, I have two major criteria. The first one is the obvious – application. What is the rifle to be used for? What kind of distance and precision are required? What kind of shooting entails? For example, shooting high-speed drills at 50-yards in a 3-Gun match is quite different than shooting a rutting bull on a crimson ridgeline during a fall elk hunt. The second criteria revolves around budget. We are spoiled for choice here with countless options ranging from wallet-friendly glass all the way up to world-class precision optics. Matching your must-have features with cost will narrow down those options.