right, i`ve been asked to take some photos for someone leaving party. it`ll be at night, loads of people there, and i just have to walk aorund and capture some moments. now i have a 300d, it suits me fine. but im looking for a new lens, because my kit lens doesnt seems to be focusing properly on auto mode anymor. i need one that is a good all round lens, thats good for taking people pictures. one that works well in lowish light as well. any suggestions?