One of the more intriguing free-agent decisions the San Francisco 49ers are going to have to make is over safety Donte Whitner.With several players -- Colin Kaepernick, Aldon Smith and Michael Crabtree -- all figuring to command big deals in the next year or so, the 49ers have to be smart about their overall spending. They can't get too crazy with their free agents this season.But with that said, Whitner is an important piece. He had a good season in 2013 and his three seasons (he signed as a free agent in 2011) with the 49ers have been a success.