There is almost $100 price difference between the Nikon Omega and the Prostaff w/ BDC. Is there any advantage to the extra eye relief on the omega? Is it worth an extra $100? Thanks for the ideas. I currently shoot a T/C Thunderhawk carbineopen sights w/ round ballso this is a major step up for me....or at least I hope. 50-75 yards is about max for me and the Thunderhawk.