Hi...sorry if this has been posted. I'm about to purchase my very first mac...it's going to be the 15" 1.67 PB. I'm going to be using it primarity for video editing on FCP. I'm eventually going to max out regular memory, but I have a question about the video memory. I'm thinking about just buying the stock PB straight form the store...but should go ahead and double the vid memory even if I don't plan on using the 30" display? My real question is: will doubling the vid memory do anything else other than make my PB rock with big display? Will it affect FCP in any way? Thanks!