I've decided on a MBP for photography work, as well as some part time EMBA courses.. I have a mac pro at home so majority of serious editing is done on that. 1. 15 or 17 - 17 high res has an AMAZING screen.. but it's bigger/heavier, and not as 'portable' as 15. the criteria is obvious.. size/portability vs. screen resolution / real estate 2. 15 low vs 15 high 50 more HDD which is not a factor b/c i'm replacing it with my own HDD So $500 more for 256 vs 512 graphics card. and 3MB vs 6MB L2 cache.. oh and 2.4 vs 2.5 ghz Is the high trim 15 worthwhile?