Im a big fan of Burris' Ballistic Plex reticle and have a few Fullfield IIs. If you have the money I would shoot for the 4.5x14-42 AO Fullfield II with Ballistic Plex. I mean, if you just have to have the big magnification you could do 6.5x20-50 but I havent been in any situation where I HAD to have a magnification above 14x but....I also live in the mountains and wide open spaces with more than 400 yards are few and far between. Anyway, I swear by Burris scopes and they have the excellent Forever warranty which has been very forgiving to me.