I have a Nikon D3100 and I wanna take nice family portraits.which of these lenses do you recommend
http://www.bestbuy.ca/en-CA/product/nikon-nikon-af-nikkor-50mm-f-1-8d-lens-af-nikkor-50mm-f-1-8/10077570.aspx?path=afef64e2357bd4c7e391aa4f469fd728en02
http://www.bestbuy.ca/en-CA/product/canon-ef-50mm-f1-8-ii-lens/10082166.aspx?path=fb83d40a1b501ad64b52eef3c393877den02
http://www.bestbuy.ca/en-CA/product/nikon-nikkor-af-s-50mm-f-1-4g-lens/10117967.aspx?path=5e255b3e9598a6cc403b69671f6e03f0en02
>>> Which of these lenses are better for portrait shooting?