I am down to around a $600 limit on a rifle scope. I am interested in shooting from 100 to 1000 yards. I would like to be able to use this as a F class gun in competition possibly. I am down between the Vortex 6.5-20x50 and the Super Sniper 20x42. I can not decide which of the two scopes would be better for me to use. Any help would be appreciated because at this point I am stuck.