Good stuff people, my biggest concern is getting a lense that obviously takes great pictures but also is relatively small. Recently I have found myself only taking my camera when I am on a shoot and seem to neglect taking pictures on a more casual basis. I think my biggest hindrance is not wanting to lug around a heavy lense while I am out. So while I am fine to use the focal length of both of these lenses I am more interested in image quality, build quality and convenience.