IMHO Vortex is the way to go. Top quality glass, manufacturing standards, and the best warranty in the business. Many guides and PHs I hunt with are making the switch to Vortex and I am kicking myself for going Leupold. I would also suggest 50mm objective due to the increased light transmission which not only means better low light image but also increased image clarity throughout the day, which is very important huunting small well camoflauged critters at range. I would also agree to pick optics with AO, but that all depends on your experience and ability in balistics and long range shooting. If you have a good handle on both then the boost AO gives you will be great if not it is just another shiny button to play with. Again IMO.