In general is it better to have 4G than 2G ...

Dear Michael,
In my opinion having a strong Macbook with 2GB is not enough.One of the reasons i say so is that while surfing on the net and having a couple of messengers open, your computer is consuming 60 to 70 % of its physical ram.That means that having an extra 2GB would be great so as to run more applications or in order not to lag the current apps.

Good day...