I would lean towards keeping all three unless you are absolutely confident that you can snag one of those good starting goaltenders that will net you 30+ wins and ~3-5 shutouts.
Between Ward and Kiprusoff though this isn't even close. Like seriously there is a HUGE gap between these two guys. Ward is better, younger, and plays for a better team.
Goalies: If I'm pickin em you best be sittin em!