http://www.microsoft.com/windows/windows-7/compare/default.aspxSorry, some of my post above was meshed in with Vista. Blame Microsoft for that.
I forgot to put the link. No, all of the versions will let you burn a DVD. Home Premium won't allow XP Mode.
It's hard to answer the question if we don't know exactly what it's going to be used for. I was assuming a business environment. I think if I had to choose one that can do most things, I would choose Professional.
And, yes, 3GBs will be more than enough RAM to run WIN7. I would say the minimum is 2GBs and that would work rather well.
