A few days ago, I posted a question about which MacBook Pro I should get, and I appreciate the comments I received. However, I have another question: I've seen the differences in video rendering between the 13" Intel Core 2 Duo and the 15" Core i5 & i7. What about DVD burning w/ iDVD? On my MacBook, it would take about 7 hours to burn a DVD. Is it any faster w/ the i5 & i7 chips? Any comments regarding this are greatly appreciated.