I'm not 100% sure on the differences between the VX II and VX IIIs. I wish that I would have put a 4-12x40 on my 7mm Rem Mag. I am more than likely going to sell my VX II and upgrade from the 3-9 to the 4-12. On game like animals, etc the 3-9 is good to 300 yards, but for target shooting, etc I like the 12 power a lil more. I'm not sure if you like to carry binos on your hunting expeditions, if you don't carry a set of binos I'd definately get a 4-12 or maybe even a lil more magnification.