I am thinking about getting an iBook. I would say I'm more a casual user than an intense one, but I wanted to know if there is a big difference between 1 GB Ram on the iBook and 1.5 GB Ram. I would think that for the iBook 1 GB Ram should be plenty. Are there really enough advantages to getting 1.5 GB Ram to justify the price? Thanks. Also, if you are buying RAM on your own, do you recommend buying the DIMMs from Apple or going to a third party and getting RAM from them. Thanks