Family of 4. We have 1 x iMac, 4 x Macbook Pros, and an iPhone. What's the best set up for linking all these together to: 1) Share files (music and photos)? 2) Back up in Time Capsule? 3) Be able to update all software from base computer (iMac) (Is this even possible)? Is the "OS X Lion Server" software our best option? Appreciate any advice from any experienced user. This is our first post.