ok guys i know im going with owc's 8 gig ram upgrade. my next question is hd. im thinking 7200 would be nice but im unsure if a larger improvement would be noticed over my stock apple 5400. i know ssd is the way to go but for the space i need they are just to expensive. if i do go with the 7200 its going to be between the seagate momentus or the western scorpio black. anyone have any opinions on either. good battery life, cool operation, and a quiet machine are huge for me so i dont want to get stuck with a hd that takes away from any of these. thanks in advance!!