I agree you need to nail down the magnification you want and the retical and adjustment scale you like or feel like learning. Mil/MOA retical and Mil/MOA adjustments some guys like Mil reticle and MOA adjustments just because we have been trained that way. Some guys say once you learn MIL/MIL its easier and "better" someway. Is this going to be a tactical or target type rifle in your mind. My rule for tactical rifles wanting 1000yd shooting is a 10x optics, i never needed more glass and i always had a nice wide FOV. In target you can close down that FOV as you dont need to see whats going on around target like in tactical shooting. With the M82A1 you can stretch its legs so magnification is going to be needed over 10x to do that. I would go with a S&B PMII (yes i know its over your 2k budget). Its worth it and will pay off when your trying to hit at 1800yds. My other suggestions would be US Optics, Premier and then Nightforce. I would look at around a 16x-20x. I know some of my suggestions are over 2k but glass isnt cheap and at the range that rifle can perform you need solid glass.

USNRigger