Dead horse I'm sure. I searched till my eyes bled. I'm almost certain I know the answer to this question. I'm upgrading from an NXS 5-22x50. The ATACR is my first choice and I'm sure the most obvious...but, with weight not being a concern (lighter or heavier) , the Mark 5HD Leupold and Vortex HD have caught My attention. I'm just not sure either is an upgrade over the NXS....or if they do in fact compete with the ATACR. My main priority is reliability (tuff) and then glass or optical clarity and brightness. Reliability not just in its ability to track consistently but also in any event of being dropped, kicked or falling on. I personally do not think the NXS has very good glass. I have several Nikons, Zeiss and a few Leupolds that seem to be brighter. Anyone have any comparison or real time behind a Mark 5HD and Vortex HD to compare.... and if they are not in the same category as an ATACR, then how does the Vortex HD and Leupold Mark5HD compare to each other? I have to get a purchase going before Sunday so any help would be great. Thanks