Hi I am looking into getting a Macbook around christmas time. I was wondering about the RAM. People say it highly increases the performance of your mac, more you have the faster. Particularly with having an integrated graphics card as well. I was going to upgrade to 2Gbs most probably when buying it. Now im thinking, is there a big difference between 1 and 2Gbs? Also Is there a big difference between 2 and 4Gbs? If it helps allot i may even go for 4. Any help much appreciated, thanks.