One thing to think about before buying the Home Premium Family Pack. You are networking 3 home computers or more. You will, at some time, want to access those computers remotely, either from one of the 3 networked computers or through a Windows Home Server. You can't access Home Premium computers through the built in Remote Desktop Connection software that comes with all Windows versions, this requires Windows Professional. So just realize if you buy Home Premium, you either live with no remote access or you have to setup third party software such as
UltraVNC.