Replying to Macbook question

I posted on here a couple weeks ago debating between the macbook pro or an imac. i decided on the macbook pro for several reasons. I have the funds in line and am going to purchase soon, just debating between the 15 inch with the i7 processor or the 17 inch with the i5. Do you all think it would be more beneficial  for video editing to have the smaller screen with faster processor, or the larger screen with the i5? I know you can upgrade the 17 inch to the i7 but where i work they dont carry it and i get a slight discount there. and at the apple store its an additional 200. so its basically between the 15 inch i7 or the 17 inch i5. Haha sorry if i make any of you dizzy with all the i5, 15, 17, and i7's!