I don't think it will make much difference really, and you should go with what feels comfortable. Even if you put a single 2GB SoDIMM in, you'll have more RAM than most people ever put in their notebooks, and I assume you're not doing 3D gaming. More RAM is always more fun, but the reality is most computers sit around most of the time waiting for the user to press the next key! I'm sure you'll be happy with whatever you decide.