I like windows 7. I have the home premium version on this laptop. The backup laptop runs 7 as well, but not sure which one.
Is there a benefit to changing up to Pro?
A Pro will allow you to join the domain. I can't think of anything else that would be easy to describe. You can see the details here. In short, if you don't have a DC at home then you don't need Pro. If you do have a domain controller then you already know the answer ;-)