Given the voltage limitations inherent in AA primary cells, about the most you'll be able to squeeze out of that format will be in the 200-240 lumen range. In this domain I recommend you check out the Lumintop Tool 3.0.
In a real emergency however you may find that runtime becomes more important, especially since the lumen output ceiling is kinda limited. Happily, almost all of the AA-fueled lights offer multiple output levels, including lower output, battery-saving modes. (My 2¢.)