i wanted to get the 17-55mm, but its too ex. i need it for lowlight event photography. basically indoor stuff. however, i'm considering the 50 f1.4 now as an alternative. it doesn't have the zoom capabilities but its aperture is irresistably good. what do you guys think? i was told that prime lens are sharper and faster in lowlights compared to zooms. is that true?
Yes. Test the USM before handing over money. I would recommend a zoom for event photography, why dont you consider 3rd party.