New Macbook Pro

Hi I'm new to this Mac-stuff so I don't really have any clue at anything.
My computer recently broke down and the time is in for buying a Mac. I have to be portable so it has to be the MBP.

Right now I'm considering the 15" 2,53 and the 2,66. I can't really see any difference other than CPU and GPU. Is the 2,66 worth buying since it has better graphic card?

And looking at the performance, are there any big differences on the two?
I might edit/watch some movies so would it be a perk with better graphic card?

Thank you

It depends how heavy the editing is going to be. If it's not going to be serious editing then you will be fine with the 2.53. Most don't notice the difference between the 2.53 and 2.66 so I think you should be fine with the 2.53.