Seriously, you have to think about what you do before buying the right optic. Combat sights like Elcan and ACOG are great if you need to move fast, shoot fast and be ready to adjust holdover with the etched BDC. They are uncomplicated with minimum requirement in external ballistic knowledge and they are not designed for super precision. You can potentially spot and correct for yourself so it is good that they have huge FOV.
If you know your ballistics pretty well and need some precision, a real "scope" is probably a better choice. How far are you shooting at? Remember, once the range passes 500m, bullets start dropping like a rainbow. If you have a laser range finder or other tools, it is probably better to be able to dial in wind and exact elevation needed (or use the mildots). If you have to shoot at moving targets, it will be easier to be able to dial in all these adjustments. On the other hand, your rifle is going to be much heavier.