cpu question

Dell is offereing to replace my xps 8300 with the i7-2600 processor because of the intell chip issue. They are offering a studio xps 9100 equipped with an i7-960 processor. This replacement unit also comes with a radeon 5870 gpu to replace my current radeon 5770 card.

Can anyone help me understand the difference in a simple way between these two processors and cards.

My primary use is video editing of a rambunctious 2-year old for the grandparents. Needless to say, gaming is no longer a priority.

Thanks in advance.