Hi everyone! I'm new here and I'm looking foward to learning more about photography. i have just purchased a canon 7D and i'm researching what lenses to buy? My photographer friend has suggested EF70-200 f2.8 as a must have lense- with out the IS and i know i would use it cause twice a year i help him out with school formals but it does seem a bit too big for me. I love photography but i really lack the confidence to do paid work, so if i'm not making money i can't really justify spending huge $$$ on lenses. Any advice??