im a canon user and im having trouble deciding whether to get the canon 17-55mm or 24-105mm . im using a 450d . optical quality is very very important to me and a few people had asked me to get the 17-55mm because im using a CF body. i have a wide angle +macro converter for my kit lens which makes it about 9-23mm and i KNOW i dont use wide angle that much so i dont think the EF 24-105mm that delivers a focal length equivalent to 38-168mm is gonna affect me . i dont realy like shooting landscapes. i plan to get a telephoto lens next time but not that soon. im still a student and i have been saving my money week by week to get 1 of these but I REALLY AM HAVING A HARD TIME CHOOSING WHICH. PLEASE HELP ME !!!!