I hate optics....BUT the differences in quality is amazing as you move up the price ladder. So far, I have tapped out around the Vortex Viper line an AAoptics refurbs. For me their glass is OK and the features adaquate with a stellar warranty. Leupold and Trijicon have the glass that seems to match my eyes. So does Huskemaw. Even the Leupold Freedom line has good glass but that is all extremely user specific.
I definitely see the difference going from my old Bushnell to the two DTs I have.