What 2.5" hard drive gives the most space and speed without compromising quality and is no more than $150. I was about to purchase a Seagate Momentus 7200.4 drive because I thought it has the most space (500GB) and speed (7200 RPM) because I do video work, BUT I have been reading comments and reviews from users that the drive isn't that fast (Scorpio Blue is comparable?) and it has excessive heating and vibration issues, which can't be good for the long term. What is the best drive and are these comments about the Momentus true? Second, would the Momentus with motion-sensors built in conflict with the sensors in the Macbook Pro? Thank you for your help again.