I just ordered a New base level MBP which obviously comes standard with 2GB of RAM. I am thinking of upgrading and buying 2x2GB RAM from Newegg.com giving me 4GB RAM. Is the performance improved by upgrading the RAM? and if so is one brand better than another? i was thinking of getting this one... http://www.newegg.com/Product/ProductReview.aspx?Item=N82E16820231135 Anybody know what RAM would be best or know if it is really even worth it?