My mom moved up from her old celeron desktop to my sister's old laptop that is some dual core intel processor, but she has not noticed any improvement with her video editing. So she wants a new computer, that can run video editing programs, such as pinnacle, good. Although I can not decide between a i5 or an i7 for the video editing. Mainly the choice is between the intel core i5 3570k and the intel core i7 3770k. Will there be much of a difference for the extra 100 bucks? And also two more things: Is 7,200 rpm hardrive sufficient for video editing? And Is the intel hd 4000 graphics good enough for video editing, or should I buy a discrete graphics card such as a gt 620(60$) or something? Thanks