i was planning on upping the ram in my 1.67 15" PB, and can't decide whether to go an additional 512mb or 1gig (i currently have 512mb). i don't think i need 1.5gig, but it might be good to get for the future. i don't run my PB too hard, just occasional photoshop, garageband, and a few games other than the basic use it for school and work. i'm planning to develop/design web pages and maybe learn video editing. not sure about the vid editing though. you guys think 1gig and 1.5gig will have a significant difference? if i were to get 512mb of Crucial ram, its only $63, but 1gig jumps to $200+, so if iwere to get 1 gig i'd probably go with eBay.