I am looking to buy a MBP 15, and I am not sure if it is better to spend some money going from 4Gb to 8Gb of RAM, from i7 2,20Gh to i7 2,30Gh or both of them. I know that always the higher option is better, but I would like to know if the change will be notable on the use. I know that later I could increase RAM by myself, but I don't want to do it (at least on the first year of the MBP. So, for the things that I will do with my Mac (high web browsing, iWork, FileMaker Pro Aperture, iMovie, watching videopodcast and films and play games) which option is better? Also I don't know if it is better to chose hi res glossy or antiglare screen. Thanks in advance for you help because I want to buy it soon. Note: excuse me because of my poor English, but I am a Spanish guy doing his best.