I would just look at the comparison chart and decide what things you wish to do. Going back and reading your original question, it doesn't sound as if you are going to use this laptop on your network anyway.
On the other hand, for $80 more, you have a full-fledged OS that is capable of running on a domain and probably even a network with more efficiency.
One thing to think about is that with Home Premium, you cannot run it in XP Mode, which could have advantages on a network.
