i posted this earlier apart of another thread but it never got answered in anyway so im making a post about...i hope no one minds...being that i do need some help here... okay forgive me but im not versed on this stuff so stupid questions i will ask... how many seconds/minutes faster is the 667 compared to the 550? i just want to know exaclty what is the difference, in real world terms...laymen terms....between the two rev b models? besides the bus speed spec ex: the 667 is 10 seconds faster on a gaussian blur filter then the 550....something like that...you get the point...so please help! if you have any links to share then please do..im trying to do some research here between the 550 and 667. i dont think barefeats has comparisons between these two guys.....just the rev b, the rev a and ibook. i was looking for some but didnt find any.